Concept explainers
To evaluate: given expression under the given conditions.
Answer to Problem 53E
Explanation of Solution
Given information:
Given expression
Calculation:
First we Sketch the angle
Since
The double angle formula for sine function is
Therefore, we need to evaluate
Using the Pythagorean Theorem, we get
Transposing the constant terms to the left hand side, we get
Taking the square roots on both sides, we get
Since
On substituting the value of
Using the double-angle formula for sine, we get
Hence, on evaluating, we get
Chapter 7 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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