Unit Circle, etc.

Front

What is the reference angle for 240°?

Back

60°

Front

Find the reference angle for an angle measuring -310°

Back

50°

Front

What is the radius of the unit circle?

Back

1

Front

Find a coterminal angle to 45 degrees.

Back

405°

Front

What is cos(5π/6)?

Back

-√3/2

Front

Define a reference angle.

Back

The smallest angle formed by the terminal side of an angle and the x-axis.

Front

How do you find a coterminal angle?

Back

Add or subtract 360° (or 2π radians) to the given angle.

Front

What is the value of sin(π/2)?

Back

1

Front

What is the value of tan(0°)?

Back

0

Front

What is the relationship between the unit circle and trigonometric functions?

Back

The coordinates of points on the unit circle correspond to the values of sine and cosine.