Math Chapter Wise Hyperbolic And Logarithmic Function Of A Complex Variable English MCQ UP PGT-2016 (02-02-2019) Q.Which one of the following is correct? A1 1 sinh x isin (ix) − − = B() 1 2 cosh x log x 1 x − = + − C() 1 1 cosh x icos ix − − = D() 1 1 tanh x itan ix − − = Show answer Correct answer: () 1 1 tanh x itan ix − − =