8.6 Unit Circle pt 1

cos(60°)

• 0

• $\frac{1}{2}$

• $\frac{\sqrt{3}}{2}$

• 1

What is the radius of a unit circle?

• 1

• 2

• $\frac{1}{2}$

• 0

What are the coordinates of 60° on the unit circle?

• (0, 1)

• $\left(\frac{1}{2},\ \frac{\sqrt{3}}{2}\right)$

• $\left(\frac{\sqrt{3}}{2},\ \frac{1}{2}\right)$

• $\left(\frac{\sqrt{2}}{2},\ \frac{1}{2}\right)$

What is sin 45°?

• 1

• $\frac{\sqrt{3}}{2}$

• $\frac{1}{2}$

• $\frac{\sqrt{2}}{2}$

What is cos 90°?

• ½

• undefined

• 1

• 0

What is tan 45°?

• 1

• $\frac{\sqrt{2}}{2}$

• $\frac{\sqrt{3}}{2}$

• $\frac{1}{2}$

 $\sin\ \frac{\pi}{4}$  

• $\frac{\sqrt{2}}{2}$

• $\frac{1}{2}$

• $\frac{\sqrt{3}}{2}$

• 0

 $What\ are\ the\ exact\ coordinates\ of\frac{\pi}{4}?$  

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

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

•  $\left(-\frac{\sqrt{3}}{2},\ \frac{\sqrt{2}}{2}\right)$  

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

cos(π)=

• 0
• 1
• -1
• 1/2

Tags

CCSS.HSF.TF.A.2

 $\cos\ 0\degree$  

• 0

•  $\frac{1}{2}$  

• 1

•  $\frac{\sqrt{3}}{2}$