cosh(iz)=cos(z) for all z ∈ C

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.3: Algebraic Expressions
Problem 20E
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Evaluate the expansion obtained for cosh in iz and verify that it coincides with the expansion obtained for cos evaluated in z in the previous question.

This way we can confirm that cosh(iz)=cos(z) for all z ∈ C

n=0
F¹ (20) (z - zo)",
f(n)
n!
Transcribed Image Text:n=0 F¹ (20) (z - zo)", f(n) n!
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