Unit Circle: Sine and Cosine Values

Front

What is the unit circle?

Back

The unit circle is a circle with a radius of 1 centered at the origin of a coordinate plane. It is used to define trigonometric functions.

Front

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

Back

(1, 0)

Front

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

Back

The sine value of an angle is the y-coordinate of the corresponding point on the unit circle.

Front

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

Back

The cosine value of an angle is the x-coordinate of the corresponding point on the unit circle.

Front

What is the sine value of $0$?

Back

0