Unit Circle Quiz Degrees

Find the measure of the angle marked in red.

• -230°

• 130°

• 230°

• 50°

Find a coterminal angle to 5°.

• 365°

• 255°

• -220°

• -365°

Find the measure of the angle marked in red.

• -200°

• 200

• -110°

• 110°

Find the reference angle.

• -65°

• 125°

• -55°

• 55°

Find the reference angle.

• -15°

• 15°

• -165°

• 165°

Unlike right triangle trigonometry, sine and cosine may be negative.

Thinking about how sine, cosine, and tangent relate to (x,y) coordinate pairs on the unit circle, find the quadrants where:

cosine is positive: ​ (a)   ​& (b)  

cosine is negative: ​ ​ (c)   &​ (d)  

• I
• IV
• II
• III