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
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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