How to solve an equation with cosine

The video tutorial explains how to solve cosine equations using both the unit circle and graphing methods. It begins with an introduction to solving graphs and then delves into using the unit circle to find specific angles where cosine equals 1/2. The tutorial continues by graphing the cosine function to visually identify solutions between 0 and 2π. Finally, it discusses finding all possible solutions by adding multiples of 2π, emphasizing the concept of infinite solutions in trigonometric functions.

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