## tanh function --activation function

Let's write the tanh function in Perl. The tanh function is one of the activation functions.

The tanh function is one of the trigonometric functions. Math::Trig Defined as a function of the module.

use strict; use warnings; # Import tanh function use Math::Trig'tanh'; my $tanh = tanh 3; # 0.995054753686731 print "$tanh\n";

### Derivative of tanh function

Please refer to the following for the derivative of the tanh function.