Скачать или смотреть Reference Angles Trigonometry, In Radians, Unit Circle - Evaluating Trig Functions

This trigonometry video tutorial explains how to find the reference angle of any angle in any quadrant. It shows you how to find the reference angle in degrees and in radians. It also shows you how to convert from degrees to radians and radians to degrees. In addition, it shows you how to evaluate trig functions using reference angles if given an angle that is commonly found in the unit circle. This video contains plenty of examples and practice problems.

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