cosh(p1)
public
Computes the hyperbolic cosine of x (expressed in radians).
Domain: (-INFINITY, INFINITY)
Codomain: [1, INFINITY)
Math.cosh(0)
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static VALUE
math_cosh(VALUE obj, VALUE x)
{
Need_Float(x);
return DBL2NUM(cosh(RFLOAT_VALUE(x)));
}