Radians & the Unit Circle REVIEW

Front

What is the conversion formula from radians to degrees?

Back

Degrees = Radians × (180/π)

Front

What is 1 full rotation in radians?

Back

2π radians.

Front

What is the value of π in degrees?

Back

180 degrees.

Front

How do you find a coterminal angle?

Back

Add or subtract multiples of 360 degrees (or 2π radians).

Front

What is the reference angle for 315 degrees?

Back

45 degrees.

Front

What is the unit circle?

Back

A circle with a radius of 1 centered at the origin of a coordinate plane.

Front

What are the coordinates of the point at 0 radians on the unit circle?

Back

(1, 0).

Front

What are the coordinates of the point at π/2 radians on the unit circle?

Back

(0, 1).

Front

What is the sine of 30 degrees?

Back

1/2.

Front

What is the cosine of 60 degrees?

Back

1/2.