tanh



sinh x=exex2{\rm sinh} \ x = \frac{e^x - e^{-x}}{2}
cosh x=ex+ex2{\rm cosh} \ x = \frac{e^x + e^{-x}}{2}

tanh x=sinh xcosh x=exexex+ex{\rm tanh} \ x = \frac{{\rm sinh} \ x}{{\rm cosh} \ x} = \frac{e^x - e^{-x}}{e^x + e^{-x}}


Cycling '74 Max使