
To prove the identity:

Explanation of Solution
Given:
An identity is given as
Concept Used:
Consider the sum-to-product formula.
Consider the sum-to-product formula.
Quotient Identity
Calculation:
In order to verify the identity:
Take left hand of above identity and simplify it using the
As,
Thus, identity is verified, i.e.
Chapter 7 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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