Evaluating Trigonometric Unit Circles

Find cos(600°)

hint: find the coterminal angle

• (-1/2)

• (-√3/2)

• (√3/2)

• (√2/2)

What is the exact coordinates of  3π/4 on the unit circle?

• (−√2∕2, √2∕2)

• (−√2∕2, −√2∕2)

• (−√3∕2, −√2∕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 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

What is the ratio for Cosine?

• Opp/Hyp

• Opp/Adj

• Adj/Opp

• Adj/Hyp

sin(315^o)

• √2/2

• -√3/2

• ½

• -√2/2

sin(11π/6)

• -1/2

• 1/2

• √3/2

• -√3/2

Choose the best match for the graph.

• 45^o

• 90^o

• 135^o

• 180^o