Evaluating trigonometric functions using the reference angle

The video tutorial explains how to find the cosine of 300 degrees using both traditional graphing methods and reference angles. Initially, the process involves graphing the angle on the unit circle and identifying corresponding coordinates. The tutorial then introduces reference angles as a more efficient method, explaining how to calculate the reference angle and use it to find the cosine value. The cosine of 300 degrees is shown to be equal to the cosine of its reference angle, 60 degrees, simplifying the process.

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