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OpenStudy (luigi0210):
Hyperbolic functions..
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OpenStudy (luigi0210):
Prove \(\LARGE {tanh(lnx)=\frac{x^2-1}{x^2+1}} \)
OpenStudy (anonymous):
use the definition of tanh(x) = sinh(x) / cosh(x), then use definition of sinh(x) and cosh(x), and then simplify
OpenStudy (anonymous):
well hope that works coz I haven't tried that either hehe :D
OpenStudy (anonymous):
yeah, it worked :D https://www.wolframalpha.com/input/?i=%28e%5E%28ln%28x%29%29+-+e%5E%28-ln%28x%29%29%29+%2F+%28e%5E%28ln%28x%29%29%2B+e%5E%28-ln%28x%29%29%29
OpenStudy (hoblos):
you got it @Luigi0210 ?
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