Unit Circle Practice

Front

What is a coterminal angle?

Back

Coterminal angles are angles that share the same terminal side when drawn in standard position. To find a coterminal angle, you can add or subtract multiples of 360° (or 2π radians).

Front

How do you convert degrees to radians?

Back

Front

What is the value of cos(0°)?

Back

The value of cos(0°) is 1.

Front

What is the value of sin(90°)?

Back

The value of sin(90°) is 1.

Front

What is the value of tan(45°)?

Back

The value of tan(45°) is 1.

Front

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

Back

The reference angle is the acute angle formed by the terminal side of the given angle and the x-axis. For angles in the second quadrant, subtract from 180°; for the third quadrant, subtract from 180°; for the fourth quadrant, subtract from 360°.

Front

Back

Front

Back

Front

Back

Front

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

Back

To find a coterminal angle for 150°, you can subtract 360°: 150° - 360° = -210°.