Coterminal Angles, Reference Angles, Degrees and Radians

Front

Convert π/3 radians to degrees

Back

60°

Front

What is the reference angle for 240°?

Back

60°

Front

What are the negative and positive coterminal angles of 240°?

Back

600°, -120°

Front

What are the negative and positive coterminal angles of -225°?

Back

135°, -585°

Front

Convert 7π/6 radians into degrees

Back

210°

Front

Define coterminal angles.

Back

Coterminal angles are angles that share the same terminal side when drawn in standard position, differing by multiples of 360°.

Front

How do you find a coterminal angle?

Back

To find a coterminal angle, add or subtract 360° (or 2π radians) from the given angle.

Front

What is a reference angle?

Back

A reference angle is the acute angle formed by the terminal side of an angle and the x-axis.

Front

How do you calculate the reference angle for an angle in the second quadrant?

Back

Subtract the angle from 180°.

Front

Convert 1 radian to degrees.

Back

Approximately 57.3°.