Pre-Calc Checkpoint: Angles and Radians

Front

What is a coterminal angle?

Back

Coterminal angles are angles that share the same terminal side when drawn in standard position. They can be found by adding or subtracting multiples of 360° (or 2π radians) to/from the angle.

Front

Find a coterminal angle to 5°.

Back

365°

Front

Find a coterminal angle to 20°.

Back

740°

Front

Which angles are coterminal to 330°?

Back

690°, -30°

Front

How do you convert radians to degrees?

Back

Front

What is the reference angle for -30°?

Back

30°.

Front

What is the formula to find a coterminal angle?

Back

Coterminal angle = original angle ± 360°n, where n is an integer.

Front

How do you convert degrees to radians?

Back

Front

What is the reference angle for 150°?

Back

30°.

Front

What is the reference angle for 210°?

Back

30°.