Unit Circle

Which angle(s) have 1/2 as a y-coordinate?

• π/6

• π/3

• -π/3

• 11π/6

• 5π/6

Which angle(s) have √3/2 as an x-coordinate?

• π/6

• π/3

• -π/6

• 11π/6

• 2π/3

What is sin 45°?

• 1
• ^√3/₂
• ½
• ^√2/₂

cos 5π/6

• -1/2
• 1/2
• √3/2
• -√3/2

Identify the Positive angle in both radians and degrees that represent point D.

•  $60\degree,\ \frac{\pi}{3}$ 

•  $45\degree,\ \frac{\pi}{4}$ 

•  $-60\degree,\ -\frac{\pi}{3}$ 

•  $90\degree,\ \frac{\pi}{2}$ 

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

• (0, 1)
• (1/2, √3/2)
• (√3/2, 1/2)
• (√2/2, 1/2)

Name the angle indicated by the graph in both radians and degrees.

• $-135\degree,\ -\frac{3\pi}{4}$

• $225\degree,\ \frac{5\pi}{4}$

• $-120\degree,\ -\frac{2\pi}{3}$

• $210\degree,\ \frac{7\pi}{6}$

Find the value of tan ( $\theta$  )

•  $\sqrt{3}$  

• 3

• -1

• 2

• π/2
• π/8
• π/6
• π/4

What is Tan 90 degrees?

• constant

• 1

• undefined

• 4