Unit Circle Trig

Front

What is the definition of the unit circle?

Back

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 at 0 degrees on the unit circle?

Back

(1, 0)

Front

What is the value of sin(90°)?

Back

1

Front

What is the value of cos(90°)?

Back

0

Front

What is the value of tan(0°)?

Back

0

Front

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

Back

sin(θ) = y-coordinate, cos(θ) = x-coordinate.

Front

What is the value of cot(θ)?

Back

cot(θ) = 1/tan(θ) = cos(θ)/sin(θ).

Front

What is the value of sin(30°)?

Back

1/2

Front

What is the value of cos(60°)?

Back

1/2

Front

What is the value of tan(45°)?

Back

1