Pre-Calculus 4.1

Front

Which quadrant is 2π/3 in?

Back

II

Front

How many radians are there in half a circle?

Back

π

Front

What is 360 degrees in radians?

Back

2π

Front

Which of the following is a negative co-terminal angle of 165 degrees?

Back

-555

Front

Which quadrant is -5π/6 in?

Back

III

Front

What is the definition of a radian?

Back

A radian is the angle subtended at the center of a circle by an arc equal in length to the radius of the circle.

Front

How do you convert degrees to radians?

Back

Multiply the degree measure by π/180.

Front

What is the formula for finding co-terminal angles?

Back

Add or subtract multiples of 360 degrees (or 2π radians).

Front

What is the range of angles in the first quadrant?

Back

0 to π/2 radians (0 to 90 degrees).

Front

What is the range of angles in the second quadrant?

Back

π/2 to π radians (90 to 180 degrees).