Unit Circle Practice

Front

What is the definition of 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.

Front

What are the coordinates of the point on the unit circle at 90 degrees?

Back

(0, 1)

Front

What is the value of sin(θ) on the unit circle?

Back

The value of sin(θ) is the y-coordinate of the point on the unit circle corresponding to the angle θ.

Front

What is the value of cos(θ) on the unit circle?

Back

The value of cos(θ) is the x-coordinate of the point on the unit circle corresponding to the angle θ.

Front

What is the relationship between radians and degrees?

Back

180 degrees is equal to π radians.

Front

What is the sine of 0 degrees?

Back

0

Front

What is the sine of 180 degrees?

Back

0

Front

What is the sine of 270 degrees?

Back

-1

Front

What is the sine of 360 degrees?

Back

0

Front

What is the value of sin(30 degrees)?

Back

1/2