Unit Circle

Front

What is the Unit Circle?

Back

A circle with a radius of 1 centered at the origin of a coordinate plane, used to define trigonometric functions.

Front

In which quadrants is cosθ positive?

Back

In the 1st and 4th quadrants.

Front

What is the value of cos(300°)?

Back

1/2.

Front

What is the value of sin(7π/6)?

Back

-1/2.

Front

What is the value of sin(π/4)?

Back

√2/2.

Front

What is the value of cos(30°)?

Back

√3/2.

Front

What are the coordinates of the point on the Unit Circle at 0 radians?

Back

(1, 0).

Front

What are the coordinates of the point on the Unit Circle at π/2 radians?

Back

(0, 1).

Front

What are the coordinates of the point on the Unit Circle at π radians?

Back

(-1, 0).

Front

What are the coordinates of the point on the Unit Circle at 3π/2 radians?

Back

(0, -1).