1. By considering (1+ expi®)", prove that "C, cos r0 = 2" cos"(0/2) cos(n /2) (ii) ►"C, sin r® = 2" cos" (0/2) sin(n®/2) Where "C, r!(n=r)!

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 54E
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1. By considering (1+ expi®)", prove that
"C, cos r0 = 2" cos"(0/2) cos(n /2)
(ii) ►"C, sin r® = 2" cos" (0/2) sin(n®/2)
Where "C,
r!(n=r)!
Transcribed Image Text:1. By considering (1+ expi®)", prove that "C, cos r0 = 2" cos"(0/2) cos(n /2) (ii) ►"C, sin r® = 2" cos" (0/2) sin(n®/2) Where "C, r!(n=r)!
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