Learn how to find multiple solutions to a trigonometric equation

The video tutorial explains how to solve a trigonometric equation involving cosine squared of 2X. The teacher demonstrates the process of adding and dividing terms to simplify the equation, and then finding solutions for 2X within the range of 0 to 2π. The lesson includes identifying initial solutions and exploring additional solutions by considering the periodic nature of the trigonometric function. The teacher emphasizes understanding the difference between angles and how to find all possible solutions by adding π/4 increments.

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