hyperbolic function , relation with ordinary trigonometric functions , identities

hyperbolic function , relation with ordinary trigonometric functions , identities

hyperbolic functions usually refers to relations involving the exponential functions e^x and e^(-x).
They are denoted by functions like sinh(x) pronounced something like shine(x),  cosh(x), tanh(x) , cosech(x), sech(x), coth(x) etc. The relationship with ordinary trigonometric functions and some identities involving hyperbolic functions is given below.

sinh(0)  = 0

cosh(0)  =1

tanh(0)  = 0

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