Pre-Calculus - Using Double Angle Formulas to Help Solve for Solutions to an Equation

The video tutorial covers solving trigonometric equations involving cosine. It begins with an introduction to the problem and reviews methods such as reverse operations and factoring. The instructor then applies multiple angle formulas to simplify the equation, using identities to express everything in terms of cosine. Finally, the equation is factored, and solutions are found using the unit circle, focusing on solutions within one revolution.

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