Unit Circle

Front

What is the value of sin π/4?

Back

√2/2

Front

What is the value of cos 150°?

Back

-√3/2

Front

What are the coordinates of 60° on the unit circle?

Back

(1/2, √3/2)

Front

What is the value of cos 5π/6?

Back

-√3/2

Front

What is the exact value of sin 150°?

Back

1/2

Front

Define the unit circle.

Back

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

Front

What is the sine of an angle in the unit circle?

Back

The y-coordinate of the point on the unit circle corresponding to that angle.

Front

What is the cosine of an angle in the unit circle?

Back

The x-coordinate of the point on the unit circle corresponding to that angle.

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)