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.

Tags

CCSS.HSF.TF.A.2

Front

In which quadrants is cosθ positive?

Back

In the 1st and 4th quadrants.

Tags

CCSS.HSF.TF.A.2

Front

What is the value of cos(300°)?

Back

1/2.

Tags

CCSS.HSF.TF.A.2

Front

What is the value of sin(7π/6)?

Back

-1/2.

Tags

CCSS.HSF.TF.A.2

Front

What is the value of sin(π/4)?

Back

√2/2.

Tags

CCSS.HSF.TF.A.2

Front

What is the value of cos(30°)?

Back

√3/2.

Tags

CCSS.HSF.TF.A.2

Front

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

Back

(1, 0).

Tags

CCSS.HSF.TF.A.2

Front

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

Back

(0, 1).

Tags

CCSS.HSF.TF.A.2

Front

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

Back

(-1, 0).

Tags

CCSS.HSF.TF.A.2

Front

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

Back

(0, -1).

Tags

CCSS.HSF.TF.A.2