Unit Circle Practice

Front

What is the value of sin(120°)?

Back

√3/2

Front

What is the value of cos(120°)?

Back

-1/2

Front

What is the value of cos(π)?

Back

-1

Front

What is the value of sin(135°)?

Back

√2/2

Front

What is the value of sin(7π/4)?

Back

-√2/2

Front

Define 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

What is the relationship between sine and cosine on the unit circle?

Back

sin(θ) = y-coordinate, cos(θ) = x-coordinate of the point on the unit circle corresponding to angle θ.

Front

What is the value of sin(90°)?

Back

1

Front

What is the value of cos(0°)?

Back

1

Front

What is the value of sin(180°)?

Back

0