Prove the identity. cos = -sin e We begin on the left side of the equation by using a Sum Formula. We can then find all exact values and simplify. + e = cos cos 2 cos e – sin sin e Cos e - sin e sin e
Prove the identity. cos = -sin e We begin on the left side of the equation by using a Sum Formula. We can then find all exact values and simplify. + e = cos cos 2 cos e – sin sin e Cos e - sin e sin e
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 62E
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