Evaluate Trig Function from Unit Circle

What is the reference angle for 275°?

• 85°

• 95°

• -85°

• -95°

What is the exact value of cos (5π/6)

• -1/2

• 1/2

• √3/2

• -√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)

Find the exact value of the cos (225⁰)

• -√3/2

• √3/2

• √2/2

• -√2/2

At θ = 30°, what is the equivalent angle measure in radians?

• π/2

• π/3

• π/4

• π/6

What radian measure corresponds to the point on the unit circle?

• π/4

• 3π/2

• 5π/4

• 7π/3

What is the function that matches this graph?

What is the function that matches this graph?

What is the ratio for Cosine?

• Opp/Hyp

• Opp/Adj

• Adj/Opp

• Adj/Hyp

What is the exact value of sin (150°)

• -1/2

• -√3/2

• 1/2

• √3/2