using System;
using static System.Console;
using static System.Math;
using static cmath;
class main{
	static int Main(){
		double x=1;
		Write("sin({0})={1:f2}\n",x,Sin(x));
		Write($"sin({x})={Sin(x)}\n");
		double y=x*Exp(x);
		Write($"y={y} (E={E})\n");
		complex I = new complex(0,1);
		complex ii = I*I;
		Write($"I*I={ii}\n");
		complex sini = sin(I);
		Write($"sin(I)={sini}\n");
		complex si2ci2 = sin(I).pow(2)+cos(I).pow(2);
		Write($"sin(I)^2+cos(I)^2={si2ci2}\n");
		complex ipowi = I.pow(I);
		Write($"I.pow(I)={ipowi}, exp(-PI/2)={Exp(-PI/2)}\n");
		complex si = (-(complex)1.0).pow(0.5);
		si.print("sqrt(-1)=");
		si.printf("sqrt(-1)=({0:f2},{1:f2})");
		var invi=1/I;
		invi.print("1/I=");
		log(I).print("log(I)=");
		(I*PI/2).print("I*PI/2=");
	return 0;
	}
}