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 is the radius of the unit circle?

Back

1

Front

What is the value of tan(0°)?

Back

0

Front

What is the value of cos(5π/6)?

Back

-√3/2

Front

What radian measure corresponds to the point (−√2/2, −√2/2) on the unit circle?

Back

5π/4

Front

What is the value of sin(π/4)?

Back

Front

What is the relationship between the coordinates of a point on the unit circle and the angle θ?

Back

For a point (x, y) on the unit circle, x = cos(θ) and y = sin(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 tan(45°)?

Back

1