How to find the reference angle of a negative radian

The video tutorial explains the concept of negative angles and radians, focusing on how to measure and understand them. It guides viewers through the process of finding the reference angle to the X axis and calculating Theta prime. The tutorial emphasizes the importance of acute reference angles being positive and provides a step-by-step calculation, including rounding to approximate values.

What is the direction of movement when measuring negative angles on a circle?

• Clockwise

• Counterclockwise

• Upwards

• Downwards

How many radians are there in a full circle?

• 4 radians

• π radians

• 2 radians

• 3 radians

What is the approximate value of π (pi) used in the video?

• 3.141

• 3.14159

• 3.15

• 3.14

What is the reference angle if the angle is negative?

• Always positive

• Always negative

• Depends on the quadrant

• Can be either positive or negative

What is the rounded value of the reference angle discussed in the video?

• 0.14

• 0.141

• 0.142

• 0.143