Evaluating for cosine using even and odd functions

The video tutorial explains the properties of even and odd functions, focusing on the cosine function. It evaluates the cosine of T as -3/4 and demonstrates that the cosine of negative T remains the same due to the even nature of the cosine function. The tutorial emphasizes that the sign does not change for cosine when dealing with negative angles, reinforcing the concept that cosine is an even function.

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