Unit Circle Review

What is the radius of the unit circle?

• 0
• 1
• 1/2
• √2/2

sin(11π/6)

• -1/2
• 1/2
• √3/2
• -√3/2

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

• y/r
• x/r
• r/y
• y/x

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

• y

• x

• x/y

• y/x

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

• y

• x

• x/y

• y/x

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

• 30°
• 45°
• 60°
• 90°

What is the angle measure, in degrees, at the red marking on the unit circle?

• 30°
• 45°
• 60°
• 90°

Choose the best match for the graph.

• 45^o
• 90^o
• 135^o
• 180^o

Choose the best match for the graph.

• 30^o
• 45^o
• 60^o
• 90^o

Choose the best match for the graph.

• 30^o
• 45^o
• 60^o
• 90^o