
#1
Sep2111, 01:53 AM

P: 2

1. The problem statement, all variables and given/known data
verify these identities: 1) tanh^2 x + sech^2 x =1 2) sinh(x+y) = sinh cosh y + cosh x sinh y 2. Relevant equations cosh2x  sinh2x = 1 sech2x + tanh2x = 1 coth2x  csch2x = 1 sinh (x ± y) = sinh x cosh y ± cosh x sinh y cosh (x ± y) = cosh x cosh y ± sinh x sinh y tanh(x ± y) = (tanh x ± tanh y)/(1 ± tanh x.tanh y) coth(x ± y) = (coth x coth y ± l)/(coth y ± coth x) 



#2
Sep2111, 01:57 AM

P: 77

Um, the identities are given to you in your "relevant equations." What is it you are asking?




#3
Sep2111, 10:17 PM

P: 2,568

Pretty sure you are suppose to show us what you did first..



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