cosh

fnreal cosh(real x) @safe pure nothrow @nogc

Calculates the hyperbolic cosine of x.

x cosh(x) invalid?
±∞ ±0.0 no
fndouble cosh(double x) @safe pure nothrow @nogc

ditto

fnfloat cosh(float x) @safe pure nothrow @nogc

ditto