Concept explainers
To find: The formula for
Answer to Problem 31WE
The formula for
Explanation of Solution
Given information:
Line1: In terms of
Calculation:
Split the given angle into the sum of two angels whose trigonometric functions have exact values.
We know that
Replace
Simplify.
Therefore, the formula for
Chapter 13 Solutions
Algebra and Trigonometry: Structure and Method, Book 2
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