Evaluate the expression for composition of cosine and arctan

The video tutorial explains how to find the angle for which the tangent is equal to sqrt 3 using the unit circle. It covers the tangent values for angles π/6, π/4, and π/3, and discusses the constraints of angles within the unit circle. The tutorial also includes a brief calculation of the cosine of π/3, emphasizing the importance of understanding these trigonometric concepts.

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