Unit Circle Practice

How do you find a coterminal angle for an angle of 150°?

• -210°

• 150°

• 210°

• 360°

How do you convert 150° to radians?

• @@rac{5 ext{π}}{6}@@

• @@rac{3 ext{π}}{4}@@

• @@rac{2 ext{π}}{3}@@

• @@rac{ ext{π}}{2}@@

What is the value of tan(30°)?

What is the value of cos(60°)?

What is the value of tan(45°)?

• 0

• 1

• √3

• ∞

What is the value of sin(30°)?

How do you find the reference angle for an angle in standard position?

• The reference angle is the acute angle formed by the terminal side of the given angle and the x-axis.

• For angles in the first quadrant, the reference angle is the angle itself.

• For angles in the second quadrant, subtract from 90°.

• For angles in the third quadrant, subtract from 180°.

What is the value of cos(0°)?

• 0

• 0.5

• 1

• -1

How do you convert degrees to radians?

• Multiply the degree measure by @@\frac{\text{π}}{180}@@

• Add 180 to the degree measure

• Divide the degree measure by 180

• Multiply the degree measure by @@\frac{180}{\text{π}}@@

What is the relationship between radians and degrees?

• 180° is equal to @@\text{π}@@ radians.

• 90° is equal to @@\text{π}@@ radians.

• 360° is equal to @@\text{π}@@ radians.

• 1 radian is equal to 180°.