cosh method

MathComplex cosh()

Implementation

MathComplex cosh(){
	if( _im == 0.0 ){
		return floatToComplex( fcosh( _re ) );
	}
	return MathComplex(
		fcosh( _re ) * ClipMath.cos( _im ),
		fsinh( _re ) * ClipMath.sin( _im )
		);
}