Unit Circle

Front

What is the Unit Circle?

Back

The Unit Circle is a circle with a radius of 1, centered at the origin (0,0) in the coordinate plane. It is used to define trigonometric functions.

Tags

CCSS.HSF.TF.A.2

Front

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

Back

(1, 0)

Tags

CCSS.HSF.TF.A.2

Front

What are the coordinates of the point at 90° on the Unit Circle?

Back

(0, 1)

Tags

CCSS.HSF.TF.A.2

Front

What are the coordinates of the point at 180° on the Unit Circle?

Back

(-1, 0)

Tags

CCSS.HSF.TF.A.2

Front

What are the coordinates of the point at 270° on the Unit Circle?

Back

(0, -1)

Tags

CCSS.HSF.TF.A.2

Front

What is the sine of 30°?

Back

1/2

Tags

CCSS.HSF.TF.A.2

Front

What is the cosine of 60°?

Back

1/2

Tags

CCSS.HSF.TF.A.2

Front

What is the tangent of 45°?

Back

1

Tags

CCSS.HSF.TF.A.2

Front

What is the relationship between sine and cosine on the Unit Circle?

Back

Sine corresponds to the y-coordinate and cosine corresponds to the x-coordinate of a point on the Unit Circle.

Tags

CCSS.HSF.TF.A.2

Front

What is the value of sin(90°)?

Back

1

Tags

CCSS.HSF.TF.A.2