how would you prove that: sinh (x+y) = sinhx coshy + coshx sinhy ?? this is a little bit tricky (for me!) since it involves hyperbolic functions
Last edited by nmanik90; Jan 23rd 2008 at 02:46 PM. Reason: wrong/misleading title
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It's not that bad. Actually, it seems easier to prove than the standard trig identity. Use
Originally Posted by nmanik90 how would you prove that: sinh (x+y) = sinhx coshy + coshx sinhy ?? this is a little bit tricky (for me!) since it involves hyperbolic functions 1. 2. So, putting these two results together ........ In answer to your question "How did you know to do that?", it helps to know what the answer has to be
Here is another way to look at the question. Add these two together. Do you realize 2cosh(x)= and 2sinh(y)= ?
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