Prove the identity. cosh(-x) = cosh(x) (This shows that cosh is an even function.) cosh(-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 65E
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Prove the identity.
cosh(-x) = cosh(x)
(This shows that cosh is an even function.)
cosh(-x)
2
+e)
Transcribed Image Text:Prove the identity. cosh(-x) = cosh(x) (This shows that cosh is an even function.) cosh(-x) 2 +e)
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