Unit Circle Trig Practice- CW

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. It is used to define trigonometric functions.

Front

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

Back

(1, 0)

Front

What is the value of sin(90°)?

Back

1

Front

What is the value of cos(180°)?

Back

-1

Front

In which quadrants is cos(θ) positive?

Back

Quadrants I and IV.

Front

In which quadrants is sin(θ) negative?

Back

Quadrants III and IV.

Front

What is the value of tan(45°)?

Back

1

Front

What is the relationship between sin(θ) and cos(θ) in the unit circle?

Back

sin(θ) = y-coordinate, cos(θ) = x-coordinate of the point on the unit circle.

Front

What is the value of sin(30°)?

Back

1/2

Front

What is the value of cos(60°)?

Back

1/2