Exact Value of Trig Functions in Unit Circle

What are the coordinates of  210° on the unit circle?

• (−√3/2, −1/2)

• (√3/2, −1/2)

• (−√3/2, 1/2)

• (−1/2,−√3/2 )

How many degrees is ^π/₂ radians?

• 30°

• 45°

• 60°

• 90°

What radian measure corresponds to the given point?

• π/4

• 3π/2

• 5π/4

• 7π/3

What is the value of cosine at 0

• 0

• 1/2

• 1

• √3 / 2

At what point are sine and cosine the same value?

• 0

• 90

• 45

• 60

sin 2π/3

• 1/2

• -1/2

• √3/2

• -√3/2

• 1
• -1
• 0
• √2/2

• √3/3
• √3
• 1
• undefined

cos 150^o

• -1/2

• 1/2

• √3/2

• -√3/2

What is the radius of a unit circle?

• 1

• 2

• 1/2

• 0