View source for Sinusoid/Fig1

<center><asy>
import graph;
size(450);
real f(real x) {return sin(x);};

real f1(real x) {return cos(x);};
draw(graph(f1,-2*pi,2*pi),blue+1,"$\cos(x)$");
draw(graph(f,-2*pi,2*pi),red+1,"$\sin(x)$");
xaxis("$x$",Arrow);
yaxis();

xtick("$\frac{\pi}{6}$",pi/6,N);
xtick("$\frac{\pi}{4}$",pi/4,N);
xtick("$\frac{\pi}{3}$",pi/3,N);
xtick("$\frac{\pi}{2}$",pi/2,N);
xtick("$\frac{3\pi}{2}$",3*pi/2,N);
xtick("$\pi$",pi,N);
xtick("$2\pi$",2*pi,N);
xtick("$-\frac{\pi}{2}$",-pi/2,N);
xtick("$-\frac{3\pi}{2}$",-3*pi/2,N);
xtick("$-\pi$",-pi,N);
xtick("$-2\pi$",-2*pi,N);

ytick("$1/2$",0.5,1,fontsize(8pt));
ytick("$\sqrt{2}/2$",sqrt(2)/2,1,fontsize(8pt));
ytick("$\sqrt{3}/2$",sqrt(3)/2,1,fontsize(8pt));
ytick("$1$",1,1,fontsize(8pt));
ytick("$-1/2$",-0.5,-1,fontsize(8pt));
ytick("$-\sqrt{2}/2$",-sqrt(2)/2,-1,fontsize(8pt));
ytick("$-\sqrt{3}/2$",-sqrt(3)/2,-1,fontsize(8pt));
ytick("$-1$",-1,-1,fontsize(8pt));

attach(legend(),truepoint(E),10E,UnFill);
</asy></center>