Unit Circle Practice

Front

What is the value of cos(4π/3)?

Back

-1/2

Front

In which quadrants is tanθ positive?

Back

The 1st and 3rd quadrants

Front

What is the value of cos(5π/6)?

Back

-√3/2

Front

What are the exact coordinates of 3π/4 on the unit circle?

Back

(−√2/2, √2/2)

Front

What is the value of tan(-π)?

Back

0

Front

Define the unit circle.

Back

A circle with a radius of 1 centered at the origin of the 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 the sine to the cosine of that angle (tanθ = sinθ/cosθ).

Front

What are the coordinates of the point at π/2 on the unit circle?

Back

(0, 1)