Trig Functions on the Unit Circle

Front

What is the value of sin(π/4)?

Back

√2/2

Front

In the unit circle, what does cos represent?

Back

x

Front

What is the value of cos(5π/3)?

Back

1/2

Front

What is the value of cot(π/4)?

Back

1

Front

What is the radius of the unit circle?

Back

1

Front

Define 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 radians on the unit circle?

Back

(1, 0)

Front

What is the value of sin(π)?

Back

0

Front

What is the value of cos(π/2)?

Back

0

Front

What is the relationship between sin and cos on the unit circle?

Back

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