How to find the reference angle of a negative angle in terms of pi

The video tutorial explains how to sketch negative angles in radians, focusing on breaking down Pi into thirds. It covers calculating reference angles and their properties, emphasizing that reference angles must be acute and positive. The tutorial concludes with a recap of the key points discussed.

What is the direction of a negative angle in radians?

• Clockwise

• Downwards

• Counterclockwise

• Upwards

How is the angle -π/3 divided in terms of the circle?

• Into sixths

• Into thirds

• Into quarters

• Into halves

What is a reference angle?

• The angle between the terminal side and the Y-axis

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

• The angle between the initial side and the Y-axis

• The angle between the initial side and the X-axis

Which of the following is true about reference angles?

• They are always acute

• They can be right angles

• They are always negative

• They can be obtuse

Why can't a reference angle be 90 degrees?

• Because 90 degrees is an obtuse angle

• Because 90 degrees is an acute angle

• Because 90 degrees is a right angle

• Because 90 degrees is a reflex angle