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class method
Math.tanh
Math.tanh(x) → Float
math.c
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static VALUE
math_tanh(VALUE unused_obj, VALUE x)
{
return DBL2NUM(tanh(Get_Double(x)));
}
Computes the hyperbolic tangent of x (expressed in radians).
Domain: (-INFINITY, INFINITY)
Codomain: (-1, 1)
Example
Math.tanh(0) #=> 0.0