find all the values of ( /) tan- I (2j ): (c) cosh- 1 (-1): (d) tanh- 1 0. ( I) i A11.\. (Cl) /1 + 2' ;r + 21n:1(11=0. 1. 2 . ... ): (d) 11;ri(11 = 0. 1. +2 .... ).
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