Unit Circle

Front

What is the Unit Circle?

Back

A circle with a radius of 1 centered at the origin of a coordinate plane, used to define trigonometric functions.

Front

What is the value of sin 0°?

Back

0

Front

What is the value of cos 0°?

Back

1

Front

What is the value of sin 90°?

Back

1

Front

What is the value of cos 90°?

Back

0

Front

In which quadrants is cosine positive?

Back

The 1st and 4th quadrants.

Front

In which quadrants is sine positive?

Back

The 1st and 2nd quadrants.

Front

What is the value of sin 30°?

Back

1/2

Front

What is the value of cos 30°?

Back

√3/2

Front

What is the value of sin 45°?

Back

√2/2