Radians & Degrees REVIEW

Front

What is the relationship between degrees and radians?

Back

Degrees and radians are both units for measuring angles. 180 degrees is equal to π radians.

Front

How do you convert degrees to radians?

Back

To convert degrees to radians, multiply the degree measure by π/180.

Front

How do you convert radians to degrees?

Back

To convert radians to degrees, multiply the radian measure by 180/π.

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

What is the reference angle for -15°?

Back

The reference angle for -15° is 15°.

Front

In which quadrant would you find the terminal side of an angle measuring -700°?

Back

The terminal side of -700° is in quadrant 1.

Front

What are the side lengths of a special right triangle with angles 30°, 60°, and 90°?

Back

In a 30-60-90 triangle, the side lengths are in the ratio 1:√3:2.

Front

What are the side lengths of a special right triangle with angles 45°, 45°, and 90°?

Back

In a 45-45-90 triangle, the side lengths are in the ratio 1:1:√2.

Front

What is the sine of 30°?

Back

The sine of 30° is 1/2.

Front

What is the cosine of 60°?

Back

The cosine of 60° is 1/2.