ASSIGNMENT 9-4 GENERAL ANGLES AND RADIAN MEASURE

Front

Convert 150° to radians.

Back

5π/6

Front

In which quadrant is -570°?

Back

II

Front

What is the reference angle for 240°?

Back

60°

Front

Find a coterminal angle to -180 degrees.

Back

180°

Front

What is 4π/3 radians in degrees?

Back

240°

Front

Define a radian.

Back

A radian is the angle subtended at the center of a circle by an arc equal in length to the radius of the circle.

Front

What is the relationship between degrees and radians?

Back

Degrees can be converted to radians by multiplying by π/180.

Front

What is a coterminal angle?

Back

Coterminal angles are angles that share the same terminal side when drawn in standard position.

Front

How do you find a coterminal angle?

Back

Add or subtract multiples of 360° (or 2π radians) to the given angle.

Front

What is the reference angle?

Back

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