Unit Circle Trig

cos(π)

• √3/2
• -√2/2
• -1
• 1

cos(5π/3)

• -√2/2
• -1/2
• 1/2
• √3/2

What is the radius of the unit circle?

• 0
• 1
• 1/2
• √2/2

Choose the best match for the graph.

• 30^o
• 45^o
• 60^o
• 90^o

Find sin(-240°)

• (√3)/2)

• (-1/2)

• (√2/2)

• (1/2)

Based on the unit circle, what is the value of tan?

• y/r
• x/r
• r/y
• y/x

Choose the best match for the graph.

• 45^o
• 90^o
• 135^o
• 180^o

Based on the unit circle, what is the value of cos?

• y

• x

• x/y

• y/x

cos(30^o)

• - ½
• √3/2
• 2√3 /3
• ½

What is the value of θ, theta, in degrees on the unit circle?

• 30°
• 45°
• 60°
• 90°