Evaluating Inverse Trigonometric Functions

The video tutorial explains how to evaluate the inverse cosine of -1. It begins by clarifying the problem and using function notation to express the cosine of theta as -1. The tutorial discusses the importance of considering the range and graph restrictions, focusing on the unit circle and x-coordinates. It then determines that the angle where the cosine equals -1 is pi, which falls within the specified range. The tutorial concludes by summarizing the evaluation process for the inverse cosine function.

How does the graph of the cosine function help in understanding the evaluation of inverse cosine?

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What angle corresponds to the cosine value of negative 1 within the specified range?

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