Unit Circle

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 an angle of 0 radians?

Back

(1, 0)

Front

What is the value of cos(π/2)?

Back

0

Front

What is the value of sin(π/2)?

Back

1

Front

What is the value of cos(π)?

Back

-1

Front

What is the value of sin(π)?

Back

0

Front

What are the coordinates of the point on the unit circle at an angle of π/4?

Back

(√2/2, √2/2)

Front

What is the value of sin(3π/2)?

Back

-1

Front

What is the value of cos(3π/2)?

Back

0

Front

What are the coordinates of the point on the unit circle at an angle of 5π/4?

Back

(-√2/2, -√2/2)