Using the Unit Circle

 $\cos\left(\frac{\pi}{6}\right)$  

•  $\frac{\sqrt{3}}{2}$  

•  $\frac{1}{2}$  

•  $\frac{\sqrt{2}}{2}$  

•  $0$  

Tags

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.3

 $\cos\left(315\degree\right)$  

•  $\frac{\sqrt{3}}{2}$  

•  $-\frac{1}{2}$  

•  $0$  

•  $\frac{\sqrt{2}}{2}$  

Tags

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.3

 $\sin\left(\frac{\pi}{2}\right)$  

•  $-1$  

•  $\frac{\sqrt{2}}{2}$  

•  $1$  

•  $-\frac{\sqrt{3}}{2}$  

Tags

CCSS.HSF.TF.A.1

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.3

 $\sin\left(\frac{5\pi}{3}\right)$  

•  $-\frac{\sqrt{3}}{2}$  

•  $\frac{1}{2}$  

•  $\frac{\sqrt{3}}{2}$  

•  $-\frac{\sqrt{2}}{2}$  

Tags

CCSS.HSF.TF.A.1

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.3

CCSS.HSF.TF.A.4

 $\cos\left(135\degree\right)$  

•  $-\frac{\sqrt{3}}{2}$  

•  $-\frac{\sqrt{2}}{2}$  

•  $\frac{1}{2}$  

•  $1$  

Tags

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.3

 $\sin\left(240\degree\right)$  

•  $-\frac{1}{2}$  

•  $-1$  

•  $-\frac{\sqrt{3}}{2}$  

•  $\frac{1}{2}$  

Tags

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.3

CCSS.HSF.TF.A.4

Which angle measure corresponds to the ordered pair of

 $\left(\frac{\sqrt{2}}{2},-\frac{\sqrt{2}}{2}\right)$  

•  $315\degree$  

•  $\frac{3\pi}{4}$  

•  $225\degree$  

•  $\frac{\pi}{4}$  

Tags

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.3

CCSS.HSF.TF.C.8

Which angle measure corresponds to the ordered pair of

 $\left(1,0\right)$  

•  $90\degree$  

•  $\frac{3\pi}{2}$  

•  $180\degree$  

•  $2\pi$  

Tags

CCSS.HSF.TF.A.1

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.3

CCSS.HSG.C.B.5

The cosine of an angle is negative. In which quadrant(s) can the solution be found.

• Quadrant 1

• Quadrant 2

• Quadrant 3

• Quadrant 4

Tags

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.4

CCSS.HSF.TF.C.8

Which statement(s) are true about sine and cosine functions in Quadrant 4?

• Sine is negative.

• Sine is positive.

• Cosine is negative.

• Cosine is positive.

Tags

CCSS.HSF.TF.A.4

CCSS.HSF.TF.C.8