How to determine the reference angle of an angle in degrees

The video tutorial explains reference angles, which are acute positive angles between the X-axis and the terminal side. It emphasizes the importance of understanding reference angles without needing to sketch them. The tutorial uses a 125-degree angle as an example, showing how to calculate the reference angle by subtracting from 180 degrees, resulting in a 55-degree reference angle. The video also clarifies that reference angles are always positive, regardless of direction.

Describe the process of sketching an angle and finding its reference angle.

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What is a reference angle and how is it determined?

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Explain why reference angles are always positive.

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How do you calculate the reference angle for an angle of 125 degrees?

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What is the relationship between the angle theta and its reference angle theta prime?

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