Asked by Vane
Verify the hyperbolic function
1 - tanh^2x = sech^2x
1 - tanh^2x = sech^2x
Answers
Answered by
oobleck
if you believe cosh^2x - sinh^2x = 1 then just divide through by cosh^2x
If not, then you can verify by using the definitions of
coshx = (e^x + e^-x)/2
sinhx = (e^x - e^-x)/2
If not, then you can verify by using the definitions of
coshx = (e^x + e^-x)/2
sinhx = (e^x - e^-x)/2
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