Trong không gian O x y z Oxyz O x y z , cho 2 đường thẳng d , d ′ d,\ d' d , d ′ có VTCP lần lượt là u → , u ′ → \overrightarrow{u}\ ,\ \overrightarrow{u'} u <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> , u ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> , 2 mặt phẳng ( α ) , ( β ) \left(\alpha\right),\ \left(\beta\right) ( α ) , ( β ) có VTPT lần lượt là n → , n ′ → \overrightarrow{n},\ \overrightarrow{n'} n <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> , n ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> . Hãy chọn các khẳng định đúng.

Góc giữa d d d và ( α ) \left(\alpha\right) ( α ) : sin ⁡ ( n → , u → ) = ∣ n → . u → ∣ ∣ n → ∣ . ∣ u → ∣ \sin\left(\overrightarrow{n},\ \overrightarrow{u}\right)=\frac{\left|\overrightarrow{n}.\ \overrightarrow{u}\right|}{\left|\overrightarrow{n}\right|.\left|\overrightarrow{u}\right|} sin ( n <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> , u <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ) = ∣ ∣ ∣ n <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ . ∣ ∣ ∣ u <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ ∣ ∣ ∣ n <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> . u <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ .

Góc giữa 2 vectơ: \cos\left(\overrightarrow{u},\ \overrightarrow{u'}\right)=\frac{\overrightarrow{u}.\ \overrightarrow{u'}}{\left|\overrightarrow{u}\right|.\left|\overrightarrow{u'}\right|} cos ( u <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> , u ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ) = ∣ ∣ ∣ u <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ . ∣ ∣ ∣ u ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ u <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> . u ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> .

Góc giữa 2 đường thẳng: \cos\left(\overrightarrow{u},\ \overrightarrow{u'}\right)=\frac{\left|\overrightarrow{u}.\ \overrightarrow{u'}\right|}{\left|\overrightarrow{u}\right|.\left|\overrightarrow{u'}\right|} cos ( u <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> , u ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ) = ∣ ∣ ∣ u <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ . ∣ ∣ ∣ u ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ ∣ ∣ ∣ u <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> . u ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ .

Góc giữa 2 mặt phẳng: \cos\left(\overrightarrow{n},\ \overrightarrow{n'}\right)=\frac{\left|\overrightarrow{n}.\ \overrightarrow{n'}\right|}{\left|\overrightarrow{n}\right|.\left|\overrightarrow{n'}\right|} cos ( n <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> , n ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ) = ∣ ∣ ∣ n <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ . ∣ ∣ ∣ n ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ ∣ ∣ ∣ n <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> . n ′ <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ∣ ∣ ∣ .

0 ° ≤ 0\degree\le 0 ° ≤ góc 2 vectơ ≤ 180 ° \le180\degree ≤ 1 8 0 ° , 0 ° ≤ 0\degree\le 0 ° ≤ góc 2 đường, 2 mặt, đường+mặt ≤ 90 ° \le90\degree ≤ 9 0 °

Trong không gian với hệ tọa độ O x y z Oxyz O x y z , cho hai vec tơ a → = ( 2 ; 1 ; 0 ) , b → = ( − 1 ; 0 ; − 2 ) \overrightarrow{a}=\left(2;\ 1;\ 0\right),\ \overrightarrow{b}=\left(-1;\ 0;\ -2\right) a <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> = ( 2 ; 1 ; 0 ) , b <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> = ( − 1 ; 0 ; − 2 ) . Tính cos ⁡ ( a → , b → ) \cos\left(\overrightarrow{a},\overrightarrow{\ b}\right) cos ( a <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> , b <path d="M0 241v40h399891c-47.3 35.3-84 78-110 128 -16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85 -40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5 -12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67 151.7 139 205zm0 0v40h399900v-40z"> ) .

− 2 25 -\frac{2}{25} − 2 5 2 .

Trong không gian với hệ tọa độ O x y z Oxyz O x y z , tính cosin của góc giữa hai mặt phẳng ( P ) : 2 x − y + 2 z − 19 = 0 , ( Q ) : x − y + 6 = 0 \left(P\right):\ 2x-y+2z-19=0,\ \left(Q\right):\ x-y+6=0 ( P ) : 2 x − y + 2 z − 1 9 = 0 , ( Q ) : x − y + 6 = 0 .

2 2 \frac{\sqrt{2}}{2} 2 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> .

− 2 2 -\frac{\sqrt{2}}{2} − 2 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> .

Trong không gian với hệ tọa độ O x y z Oxyz O x y z , tính cosin của góc giữa 2 đường thẳng d : x + 1 − 3 = y + 2 2 = z − 4 1 d:\ \frac{x+1}{-3}=\frac{y+2}{2}=\frac{z-4}{1} d : − 3 x + 1 = 2 y + 2 = 1 z − 4 và d ′ : x − 3 2 = y + 1 5 = z − 2 2 d':\ \frac{x-3}{2}=\frac{y+1}{5}=\frac{z-2}{2} d ′ : 2 x − 3 = 5 y + 1 = 2 z − 2 .

462 77 \frac{\sqrt{462}}{77} 7 7 4 6 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> .

− 462 77 -\frac{\sqrt{462}}{77} − 7 7 4 6 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> .

− 1 77 -\frac{1}{77} − 7 7 1 .

Trong không gian với hệ tọa độ O x y z Oxyz O x y z , tìm m ∈ R m\in R m ∈ R để góc giữa hai mặt phẳng ( P ) : x − 2 y + 2 z − 5 = 0 \left(P\right):\ x-2y+2z-5=0 ( P ) : x − 2 y + 2 z − 5 = 0 ( Q ) : x + ( 2 m − 1 ) z + 7 = 0 \left(Q\right):\ x+\left(2m-1\right)z+7=0 ( Q ) : x + ( 2 m − 1 ) z + 7 = 0 bằng π 4 \frac{\pi}{4} 4 π .

m = 2 , m = 4 m=\sqrt{2},\ m=4 m = 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> , m = 4 .

m=2,\ m=-2\sqrt{2} m = 2 , m = − 2 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> .

Oxyz - Góc

Quiz

•

Mathematics

•

12th Grade

•

Practice Problem

•

Hard

Nguyễn Phượng

Used 5+ times

FREE Resource

10 questions

Show all answers

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Trong không gian $Oxyz$ , cho 2 đường thẳng $d,\ d'$ có VTCP lần lượt là $\overrightarrow{u}\ ,\ \overrightarrow{u'}$ , 2 mặt phẳng $\left(\alpha\right),\ \left(\beta\right)$ có VTPT lần lượt là $\overrightarrow{n},\ \overrightarrow{n'}$ . Hãy chọn các khẳng định đúng.

Góc giữa $d$ và $\left(\alpha\right)$ : $\sin\left(\overrightarrow{n},\ \overrightarrow{u}\right)=\frac{\left|\overrightarrow{n}.\ \overrightarrow{u}\right|}{\left|\overrightarrow{n}\right|.\left|\overrightarrow{u}\right|}$ .

Góc giữa 2 vectơ: $\cos\left(\overrightarrow{u},\ \overrightarrow{u'}\right)=\frac{\overrightarrow{u}.\ \overrightarrow{u'}}{\left|\overrightarrow{u}\right|.\left|\overrightarrow{u'}\right|}$ .

Góc giữa 2 đường thẳng: $\cos\left(\overrightarrow{u},\ \overrightarrow{u'}\right)=\frac{\left|\overrightarrow{u}.\ \overrightarrow{u'}\right|}{\left|\overrightarrow{u}\right|.\left|\overrightarrow{u'}\right|}$ .

Góc giữa 2 mặt phẳng: $\cos\left(\overrightarrow{n},\ \overrightarrow{n'}\right)=\frac{\left|\overrightarrow{n}.\ \overrightarrow{n'}\right|}{\left|\overrightarrow{n}\right|.\left|\overrightarrow{n'}\right|}$ .

$0\degree\le$ góc 2 vectơ $\le180\degree$ , $0\degree\le$ góc 2 đường, 2 mặt, đường+mặt $\le90\degree$

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Trong không gian với hệ tọa độ $Oxyz$ , cho hai vec tơ $\overrightarrow{a}=\left(2;\ 1;\ 0\right),\ \overrightarrow{b}=\left(-1;\ 0;\ -2\right)$ . Tính $\cos\left(\overrightarrow{a},\overrightarrow{\ b}\right)$ .

$-\frac{2}{25}$ .

$-\frac{2}{5}$ .

$\frac{2}{25}$ .

$\frac{2}{5}$ .

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa hai vectơ $\overrightarrow{a}=\left(-\sqrt{3};\ 0;\ 1\right),\ \overrightarrow{i}$ .

$120\degree$ .

$60\degree$ .

$150\degree$ .

$30\degree$ .

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Trong không gian với hệ tọa độ $Oxyz$ , tính sin của góc giữa đường thẳng $d:\ \frac{x-1}{4}=\frac{y-6}{3}=\frac{z+4}{1}$ và mặt phẳng $\left(P\right):\ 4x+3y-z+1=0$ .

$\frac{5}{13}$ .

$\frac{8}{13}$ .

$\frac{1}{13}$ .

$\frac{12}{13}$ .

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa đường thẳng $d:\ x=1-t,\ y=2+2t,\ z=3+t$ và mặt phẳng $\left(P\right):\ x-y+3=0$ .

$60\degree$ .

$30\degree$ .

$120\degree$ .

$45\degree$ .

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Trong không gian với hệ tọa độ $Oxyz$ , tính cosin của góc giữa hai mặt phẳng $\left(P\right):\ 2x-y+2z-19=0,\ \left(Q\right):\ x-y+6=0$ .

$\frac{\sqrt{2}}{2}$ .

$-\frac{\sqrt{2}}{2}$ .

$\frac{1}{2}$ .

$-\frac{1}{2}$ .

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa hai mặt phẳng $\left(P\right):\ x-\sqrt{2}y+z-4=0,\$ $\left(Q\right):x+\sqrt{2}y-z+5=0$ .

$60\degree$ .

$90\degree$ .

$120\degree$ .

$45\degree$ .

Create a free account and access millions of resources

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

10 questions

ลิมิตของลำดับ

Quiz

•

12th Grade

10 questions

LIMIT TRIGONOMETRI

Quiz

•

12th Grade

11 questions

Poměr

Quiz

•

6th - 12th Grade

10 questions

Persamaan Nilai Mutlak 1

Quiz

•

10th - 12th Grade

6 questions

SOHCAHTOA

Quiz

•

KG - University

10 questions

Differentiation of Trigonometric Functions

Quiz

•

12th Grade - University

10 questions

áreas sombreadas

Quiz

•

12th Grade

10 questions

ลำดับเรขาคณิต

Quiz

•

11th - 12th Grade

Popular Resources on Wayground

10 questions

Honoring the Significance of Veterans Day

Interactive video

•

6th - 10th Grade

9 questions

FOREST Community of Caring

Lesson

•

1st - 5th Grade

10 questions

Exploring Veterans Day: Facts and Celebrations for Kids

Interactive video

•

6th - 10th Grade

19 questions

Veterans Day

Quiz

•

5th Grade

14 questions

General Technology Use Quiz

Quiz

•

8th Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

15 questions

Circuits, Light Energy, and Forces

Quiz

•

5th Grade

19 questions

Thanksgiving Trivia

Quiz

•

6th Grade

Discover more resources for Mathematics

34 questions

Geometric Terms

Quiz

•

9th - 12th Grade

16 questions

Proportional Relationships And Constant Of Proportionality

Quiz

•

7th - 12th Grade

15 questions

Identify Triangle Congruence Criteria

Quiz

•

9th - 12th Grade

13 questions

Reading And Writing Numerical Expression

Quiz

•

6th - 12th Grade

56 questions

CCG 2.2.3 Area

Quiz

•

9th - 12th Grade

20 questions

SSS/SAS

Quiz

•

9th - 12th Grade

15 questions

Analyze Triangle Congruence Conditions

Quiz

•

9th - 12th Grade

10 questions

Angle Relationships with Parallel Lines and a Transversal

Quiz

•

9th - 12th Grade

Oxyz - Góc

10 questions

Trong không gian với hệ tọa độ $Oxyz$ , cho hai vec tơ $\overrightarrow{a}=\left(2;\ 1;\ 0\right),\ \overrightarrow{b}=\left(-1;\ 0;\ -2\right)$ . Tính $\cos\left(\overrightarrow{a},\overrightarrow{\ b}\right)$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa hai vectơ $\overrightarrow{a}=\left(-\sqrt{3};\ 0;\ 1\right),\ \overrightarrow{i}$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính sin của góc giữa đường thẳng $d:\ \frac{x-1}{4}=\frac{y-6}{3}=\frac{z+4}{1}$ và mặt phẳng $\left(P\right):\ 4x+3y-z+1=0$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa đường thẳng $d:\ x=1-t,\ y=2+2t,\ z=3+t$ và mặt phẳng $\left(P\right):\ x-y+3=0$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính cosin của góc giữa hai mặt phẳng $\left(P\right):\ 2x-y+2z-19=0,\ \left(Q\right):\ x-y+6=0$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa hai mặt phẳng $\left(P\right):\ x-\sqrt{2}y+z-4=0,\$ $\left(Q\right):x+\sqrt{2}y-z+5=0$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính cosin của góc giữa 2 đường thẳng $d:\ \frac{x+1}{-3}=\frac{y+2}{2}=\frac{z-4}{1}$ và $d':\ \frac{x-3}{2}=\frac{y+1}{5}=\frac{z-2}{2}$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa hai đường thẳng $d:\ x=1+t,\ y=-\sqrt{2}t,\ z=0$ và $d':\ x=1+t',\ y=2-\sqrt{2}t',\ z=3-t'$ .

Trong không gian với hệ tọa độ $Oxyz$ , tìm $m\in R$ để góc giữa hai mặt phẳng $\left(P\right):\ x-2y+2z-5=0$ $\left(Q\right):\ x+\left(2m-1\right)z+7=0$ bằng $\frac{\pi}{4}$ .

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

Oxyz - Góc

10 questions

Trong không gian với hệ tọa độ OxyzOxyzOxyz , tính góc giữa hai vectơ a→=(−3; 0; 1), i→\overrightarrow{a}=\left(-\sqrt{3};\ 0;\ 1\right),\ \overrightarrow{i}a=(−3​; 0; 1), i .

Trong không gian với hệ tọa độ OxyzOxyzOxyz , tính sin của góc giữa đường thẳng d: x−14=y−63=z+41d:\ \frac{x-1}{4}=\frac{y-6}{3}=\frac{z+4}{1}d: 4x−1​=3y−6​=1z+4​ và mặt phẳng \left(P\right):\ 4x+3y-z+1=0(P): 4x+3y−z+1=0 .

Trong không gian với hệ tọa độ OxyzOxyzOxyz , tính góc giữa đường thẳng d: x=1−t, y=2+2t, z=3+td:\ x=1-t,\ y=2+2t,\ z=3+td: x=1−t, y=2+2t, z=3+t và mặt phẳng (P): x−y+3=0\left(P\right):\ x-y+3=0(P): x−y+3=0 .

Trong không gian với hệ tọa độ OxyzOxyzOxyz , tính cosin của góc giữa hai mặt phẳng (P): 2x−y+2z−19=0, (Q): x−y+6=0\left(P\right):\ 2x-y+2z-19=0,\ \left(Q\right):\ x-y+6=0(P): 2x−y+2z−19=0, (Q): x−y+6=0 .

Trong không gian với hệ tọa độ OxyzOxyzOxyz , tính góc giữa hai mặt phẳng (P): x−2y+z−4=0, \left(P\right):\ x-\sqrt{2}y+z-4=0,\ (P): x−2​y+z−4=0, (Q):x+2y−z+5=0\left(Q\right):x+\sqrt{2}y-z+5=0(Q):x+2​y−z+5=0 .

Trong không gian với hệ tọa độ OxyzOxyzOxyz , tính góc giữa hai đường thẳng d: x=1+t, y=−2t, z=0d:\ x=1+t,\ y=-\sqrt{2}t,\ z=0d: x=1+t, y=−2​t, z=0 và d′: x=1+t′, y=2−2t′, z=3−t′d':\ x=1+t',\ y=2-\sqrt{2}t',\ z=3-t'd′: x=1+t′, y=2−2​t′, z=3−t′ .

Trong không gian với hệ tọa độ OxyzOxyzOxyz , tìm m∈Rm\in Rm∈R để góc giữa hai mặt phẳng (P): x−2y+2z−5=0\left(P\right):\ x-2y+2z-5=0(P): x−2y+2z−5=0 (Q): x+(2m−1)z+7=0\left(Q\right):\ x+\left(2m-1\right)z+7=0(Q): x+(2m−1)z+7=0 bằng π4\frac{\pi}{4}4π​ .

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa hai vectơ $\overrightarrow{a}=\left(-\sqrt{3};\ 0;\ 1\right),\ \overrightarrow{i}$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính sin của góc giữa đường thẳng $d:\ \frac{x-1}{4}=\frac{y-6}{3}=\frac{z+4}{1}$ và mặt phẳng $\left(P\right):\ 4x+3y-z+1=0$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa đường thẳng $d:\ x=1-t,\ y=2+2t,\ z=3+t$ và mặt phẳng $\left(P\right):\ x-y+3=0$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính cosin của góc giữa hai mặt phẳng $\left(P\right):\ 2x-y+2z-19=0,\ \left(Q\right):\ x-y+6=0$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa hai mặt phẳng $\left(P\right):\ x-\sqrt{2}y+z-4=0,\$ $\left(Q\right):x+\sqrt{2}y-z+5=0$ .

Trong không gian với hệ tọa độ $Oxyz$ , tính góc giữa hai đường thẳng $d:\ x=1+t,\ y=-\sqrt{2}t,\ z=0$ và $d':\ x=1+t',\ y=2-\sqrt{2}t',\ z=3-t'$ .

Trong không gian với hệ tọa độ $Oxyz$ , tìm $m\in R$ để góc giữa hai mặt phẳng $\left(P\right):\ x-2y+2z-5=0$ $\left(Q\right):\ x+\left(2m-1\right)z+7=0$ bằng $\frac{\pi}{4}$ .