CommandssinhOn this pagesinh sinh (num) The sinh function returns the hyperbolic sine of num : sinh(x)=ex−e−x2.\displaystyle \sinh (x)=\frac{e^{x}-e^{-x}}{2}.sinh(x)=2ex−e−x. In complex expressions, num is complex, and sinh(num) returns a complex value. See Also cosh, tanh, coth