Exercise 5. Let z=x+iy be a complex number such that cos (3z) # 0. Then Re(tan(3z)) is equal to sin3xcos3x a. sinh23x+cos²3y sinh(3x)cosh(3x) b. cos2(3x)+sinh²(3y) sin(3x)cos(3x) с. cos2(3x)+sinh²(3y) d. None of these
Exercise 5. Let z=x+iy be a complex number such that cos (3z) # 0. Then Re(tan(3z)) is equal to sin3xcos3x a. sinh23x+cos²3y sinh(3x)cosh(3x) b. cos2(3x)+sinh²(3y) sin(3x)cos(3x) с. cos2(3x)+sinh²(3y) d. None of these
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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