Calculate element-wise hyperbolic tangent of input.
tanh(x) = sinh(x)/cosh(x) = (exp(x) - exp(-x)) / (exp(x) + exp(-x))
Calculate element-wise hyperbolic tangent of input.
tanh(x) = sinh(x)/cosh(x) = (exp(x) - exp(-x)) / (exp(x) + exp(-x))