Pre-Calculus - Using the difference of two angles to evaluate the an angle for cosine, cos195

The video tutorial covers the evaluation of trigonometric functions using coordinate points and angles on the unit circle. It explains the subtraction of angles and the calculation of cosine and sine values for specific angles. The instructor emphasizes the importance of paying attention to avoid common mistakes, such as mixing up angles. The tutorial concludes with a demonstration of final calculations and factoring techniques.

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