To find: the exact value of the trigonometric expression when

Answer to Problem 43E
Explanation of Solution
Given information:
Given expression,
Calculation:
Consider that
The sine of an angle is equal to opposite side over the hypotenuse. Since
Since cosine of an angle is equal to adjacent side over the hypotenuse and
Therefore:
Since,
Since the side of an angle is equal to opposite side over the hypotenuse. Therefore:
Apply the sum formula for sine that is:
Substitute:
And,
So,
Therefore,
Chapter 5 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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