Sine Cosine Degrees Unit Circle

Front

What is the value of sin 180°?

Back

0

Front

What is the value of cos 180°?

Back

-1

Front

What is the value of cos 135°?

Back

-\frac{\sqrt{2}}{2}

Front

What is the value of cos 225°?

Back

-\frac{\sqrt{2}}{2}

Front

What is the exact value of sin 150°?

Back

\frac{1}{2}

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 where the terminal side of the angle intersects the unit circle.

Front

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

Back

The x-coordinate of the point where the terminal side of the angle intersects the unit circle.

Front

What is the relationship between sine and cosine for complementary angles?

Back

sin(θ) = cos(90° - θ) and cos(θ) = sin(90° - θ).

Front

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

Back

(1, 0)