d. Show that sin 8x + sin 4x cos8x-cos4x = -cot(2x)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 88E
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d. Show that
sin 8x + sin 4x
cos8x-cos4x
= -cot(2x)
Transcribed Image Text:d. Show that sin 8x + sin 4x cos8x-cos4x = -cot(2x)
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