Unit circle Degrees and Radians

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 on the unit circle at 0 degrees?

Back

(1, 0)

Tags

CCSS.HSF.TF.A.2

Front

How do you convert degrees to radians?

Back

To convert degrees to radians, multiply the degree measure by π/180.

Tags

CCSS.HSF.TF.A.1

Front

What is the radian measure of 90 degrees?

Back

π/2 radians.

Tags

CCSS.HSF.TF.A.1

Front

What is the sine of 30 degrees?

Back

1/2.

Tags

CCSS.HSF.TF.A.2

Front

What is the cosine of 60 degrees?

Back

1/2.

Tags

CCSS.HSF.TF.A.2

Front

What is the tangent of 45 degrees?

Back

1.

Tags

CCSS.HSF.TF.A.2

Front

What are the coordinates of the point on the unit circle at 180 degrees?

Back

(-1, 0)

Tags

CCSS.HSF.TF.A.2

Front

What is the length in radians of the arc of the circle from 0 degrees to 360 degrees?

Back

2π radians.

Tags

CCSS.HSF.TF.A.1

Front

What is the value of theta in radians for 150 degrees?

Back

5π/6 radians.

Tags

CCSS.HSF.TF.A.1