sin(증+ ) sin(증-지) + sin = COS X We begin on the left side of the equation by using Sum and Difference Formulas. We can then combine like terms, fi exact values, and simplify. sin + *) + sin( - x) - ((an| sin x) + (sin Cos x + cos COS X - COS sin = = 2( sin COS X = 2 COS X = COS X

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 43E
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Prove the identity.
sin + *) + sin(
= COS X
-
6.
6.
We begin on the left side of the equation by using Sum and Difference Formulas. We can then combine like terms, find all
exact values, and simplify.
sin( * *) + sin( - x) - ((sn
cos x + cos * sin x) + (sin
6.
IT
COS X -
COS
sin x
- 2(sin
COS X
COS X
%D
= COS X
Transcribed Image Text:Prove the identity. sin + *) + sin( = COS X - 6. 6. We begin on the left side of the equation by using Sum and Difference Formulas. We can then combine like terms, find all exact values, and simplify. sin( * *) + sin( - x) - ((sn cos x + cos * sin x) + (sin 6. IT COS X - COS sin x - 2(sin COS X COS X %D = COS X
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