Radians & Degrees REVIEW

Front

What is the relationship between radians and degrees?

Back

1 radian = 180/π degrees; 1 degree = π/180 radians.

Front

How many radians are in a full circle?

Back

2π radians.

Front

What is the value of π in degrees?

Back

180 degrees.

Front

Which quadrant is represented by angles between 90° and 180°?

Back

Quadrant II.

Front

Convert 90° to radians.

Back

π/2 radians.

Front

What is the cosine of 0 radians?

Back

1.

Front

What is the sine of π/2 radians?

Back

1.

Front

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

Back

Subtract 360° or 2π radians until the angle is between 0° and 360° (or 0 and 2π radians).

Front

What is the cosine of 180°?

Back

-1.

Front

Convert 360° to radians.

Back

2π radians.