Posted inComplex Analysis how to prove that tan iz=-i tanh z ? Posted by By SK Math Expert June 16, 2023Posted inComplex Analysis Question : Prove that tan iz=-i tanh z ?Answer : A complex number z is written as \[z=x+iy\]where x and y are real numbers.By the formula\[tan (iz) = \frac{sin (iz)}{cos (iz)}\]Now sin (iz) =i sinh z and cos (iz) =… This Question has been answered. Please Login or Register to See The Answer Post navigation Previous Post What are real and imaginary parts of cosh z ?Next PostWhat are real and imaginary parts of tanh z ?