Evaluate Trigonometric Functions Using Unit Circle

If cos ϴ = -√(3)/2 and sin ϴ = 1/2 then tan (180 - ϴ)

• -√3

• √3

• -√(3)/3

• √(3)/3

If cos ϴ = -√(3)/2 and sin ϴ = 1/2 then sin (180 + ϴ)

• -√(3)/2

• √(3)/2

• -1/2

• 1/2

• NONE

Evaluate the trigonometric functions using your activity.

• 0

• undefined

• 1

• -1

• -√3

If cos ϴ = -√(3)/2 and sin ϴ = 1/2 then cos (90 - ϴ)

• -√(3)/2

• √(3)/2

• -1/2

• 1/2

What is cos 90°?

• ½

• undefined

• 1

• 0

cos 150^o

• -1/2

• 1/2

• √3/2

• -√3/2

What is the radius of a unit circle?

• 1

• 2

• 1/2

• 0

What is the exact value of sin 150°

• -1/2

• -√3/2

• 1/2

• √3/2

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

• (0, 1)

• (1/2, √3/2)

• (√3/2, 1/2)

• (√2/2, 1/2)