Evaluate the expression for the composition of inverse sine and cosine

The video tutorial covers the calculation of the cosine of 5π/6, starting with an introduction to the concept and the importance of reference angles. It explains how to determine the reference angle and use the unit circle to find the cosine value, noting that it is negative in the second quadrant. The tutorial also includes a reminder on performing function compositions, emphasizing the need to start with the innermost function. The session concludes with final observations and a recap of the key points discussed.

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