Question

find \(\large \frac{d}{dz} (\cosh^{-1} z)\)

Answer 1

z in complex plane
also
\(\large \cosh^{-1} z = \log (z +\sqrt{z^2-1})\)

Answer 2

@amistre64 @ganeshie8 @whpalmer4 @eliassaab

Answer 3

@amistre64 @ganeshie8 @whpalmer4 @eliassaab @zzr0ck3r @zepdrix @AccessDenied
plz anyone help ?

Answer 4

Suggest http://www.wolframalpha.com/input/?i=differentiate+arccosh+z for the first.
What are you requesting in the second case?

Answer 5

its not a secong case i only gaev the value of cosh ^-1 in complex plane

Answer 6

not in real plane

Answer 7

very welcome!