Unit Circle Practice

Front

What is the radius of a unit circle?

Back

1

Front

What is the value of sin(90°)?

Back

1

Front

In which quadrants is sinθ positive?

Back

the 1st and 2nd quadrants

Front

What is the value of cos(330°)?

Back

√3/2

Front

What is the value of sin(5π/3)?

Back

-√3/2

Front

What is the relationship between the angles in the unit circle and their sine values?

Back

Sine values correspond to the y-coordinates of points on the unit circle.

Front

What is the relationship between the angles in the unit circle and their cosine values?

Back

Cosine values correspond to the x-coordinates of points on the unit circle.

Front

What is the value of sin(180°)?

Back

0

Front

What is the value of cos(90°)?

Back

0

Front

What is the value of sin(270°)?

Back

-1