Unit Circle Practice

Front

What is the value of sin(π/4)?

Back

√2/2

Front

What is the value of sin(210°)?

Back

-1/2

Front

What is the value of tan(7π/4)?

Back

-1

Front

For what angles are sine and cosine equal?

Back

45° and 225°

Front

What is the equivalent angle measure in radians for θ = 30°?

Back

π/6

Front

Define the unit circle.

Back

A circle with a radius of 1 centered at the origin of a coordinate plane.

Front

What is the sine of an angle in the unit circle?

Back

The y-coordinate of the point on the unit circle corresponding to that angle.

Front

What is the cosine of an angle in the unit circle?

Back

The x-coordinate of the point on the unit circle corresponding to that angle.

Front

What is the tangent of an angle in the unit circle?

Back

The ratio of sine to cosine (tan(θ) = sin(θ)/cos(θ)).

Front

What are the coordinates of the point at 90° on the unit circle?

Back

(0, 1)