Concept explainers
To calculate: The exact value of the expression
Answer to Problem 19RE
The exact value of the expression
Explanation of Solution
Given information:
The expression is
Formula used:
For the cosine function and its inverse, the following holds:
Where,
Calculation:
Consider the expression
Observe that the value
Recall that for the cosine function and its inverse is related as,
Where,
Therefore, the exact value of the expression
Thus, the exact value of the expression
Chapter 7 Solutions
Precalculus
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