How to solve a trigonometric equation

The video tutorial explains how to solve equations by isolating the cosine of X. It demonstrates the process of undoing operations like addition, subtraction, and multiplication to isolate cosine. The unit circle is used to identify angles where cosine equals specific values. The concept of coterminal angles is introduced, showing how they relate to the solution of the equation. The tutorial emphasizes understanding these mathematical concepts through practice and memorization.

Explain the significance of coterminal angles in the context of the cosine function.

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What is the final expression for X that includes all coterminal angles?

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