Function Tan

TSDualNum.h:329–333

	}

	DualNum Tan(const DualNum& d)
	{
		float a = Tan(d.s);
		return (DualNum(a, d.t * (a * a + 1.0F)));
	}

	// ==============================================
	//	AntiExp, AntiSin, AntiCos, and AntiTan