Unit Circle

Front

What is a unit circle?

Back

A unit circle is a circle with a radius of 1, centered at the origin (0,0) in the coordinate plane.

Front

What is the radius of a unit circle?

Back

1

Front

What are the coordinates of 0° on the unit circle?

Back

(1, 0)

Front

What are the coordinates of 90° on the unit circle?

Back

(0, 1)

Front

What are the coordinates of 180° on the unit circle?

Back

(-1, 0)

Front

What are the coordinates of 270° on the unit circle?

Back

(0, -1)

Front

What is the sine of 0°?

Back

0

Front

What is the cosine of 0°?

Back

1

Front

What is the tangent of 45°?

Back

1

Front

What is the sine of π/4?

Back

√2/2