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Mathematical Methods for Physics and Engineering - Matematica.NET

Mathematical Methods for Physics and Engineering - Matematica.NET

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3.7 HYPERBOLIC FUNCTIONS4cosech −1 x2sinh −1 x−2 −11 2xcosech −1 x−2−4Figure 3.15 Graphs of sinh −1 x <strong>and</strong> cosech −1 x.42tanh −1 xcoth −1 x−2 −11 2xcoth −1 x−2−4Figure 3.16 Graphs of tanh −1 x <strong>and</strong> coth −1 x.hyperbolic functions are given byd(cosh x) = sinh x, (3.52)dxd(sinh x) =coshx. (3.53)dxThey may be deduced by considering the definitions (3.38), (3.39) as follows.107

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