Learn how to determine the reference angle of an angle in terms of pi

The video tutorial explains the concept of reference angles, defining them as the acute positive angle between the X axis and the terminal side. It demonstrates how to graph angles in radians, specifically using π, and breaks down the process of calculating reference angles. The tutorial also covers the concept of Theta prime, explaining its significance and calculation as π/6 in the context of a given angle.

What is a reference angle?

• An angle that is always negative

• The acute positive angle between the X-axis and the terminal side

• An angle that measures more than 180 degrees

• The angle formed by the Y-axis and the terminal side

How many radians are in half of a circle?

• 2π radians

• 3π radians

• π/2 radians

• π radians

When graphing 5π/6, how many sections should the circle be divided into?

• 4 sections

• 5 sections

• 6 sections

• 8 sections

What is the reference angle for 5π/6?

• π/4

• π/3

• π/2

• π/6

Why is the reference angle always positive?

• Because it is measured in degrees

• Because it is the smallest angle

• Because reference angles do not have direction

• Because it is always less than 90 degrees