Show that if z = x+ iy, then: | cosh-z|2 sinh x Hint: use the equation: | coshzf = sinhx+ cos"y

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 104E
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Show that if z = x + iy, then:
| cosh -z|2 sinh x
Hint: use the equation:
| coshz = sinh" x+ cos"y
Transcribed Image Text:Show that if z = x + iy, then: | cosh -z|2 sinh x Hint: use the equation: | coshz = sinh" x+ cos"y
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