Unit Circle Practice

Front

When does sin(x) = 0?

Back

sin(x) = 0 when x = nπ, where n is an integer.

Front

What is the definition of tangent in terms of sine and cosine?

Back

Tangent is defined as tan(x) = sin(x)/cos(x).

Front

What is sin(120°)?

Back

sin(120°) = √3/2.

Front

What is sin(3π/2)?

Back

sin(3π/2) = -1.

Front

What is the value of tan(7π/4)?

Back

tan(7π/4) = -1.

Front

What are the coordinates of the point on the unit circle at 0 radians?

Back

(1, 0).

Front

What is the value of cos(90°)?

Back

cos(90°) = 0.

Front

What is the value of sin(45°)?

Back

sin(45°) = √2/2.

Front

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

Back

The sine value corresponds to the y-coordinate and the cosine value corresponds to the x-coordinate of the point on the unit circle.

Front

What is the value of cos(π)?

Back

cos(π) = -1.