
ôn tập
Quiz
•
Mathematics
•
10th Grade
•
Practice Problem
•
Medium
Vonl Chau
Used 1+ times
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30 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Tam giác ABC có (-B - C)= 120° khẳng định nào sau đây đúng?
a2 = b2 + c2 – 3bc
a2 = b2 + c2 – 0.5bc
a2 = b2 + c2 + 3bc
a2 = b2 + c2 + 0.5bc
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Giá trị của tan(90°) bằng
1
0
-1
kết quả khác
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Hình bình hành có hai cạnh là 3 và 6, một đường chéo bằng 5. Tìm độ dài đường chéo còn lại.
√43
√65
8
8√3
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Cho 0° < α < 90°. Kết luận nào sau đây sai
tan(α) > 0
sin(α) > 0
cot(α) > 0
cả 3 đáp án đều sai
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Trong các đẳng thức sau, đẳng thức nào đúng?
cos(– α) = – cos α
cos( α) = – cos α
cos(- α) = cos α
cos(α) = cos α
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Cho cosα=−√3/2 và góc α thỏa mãn 90° < α < 180°. Khi đó.
cotα= -√3/2
sinα=3/5
tanα= -1/√3
sinα= - 0.5
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Giá trị của cot1485° là
1
-1
0
kết quả khác
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