matlab把正弦和余弦函数图像画在一个图里面

t=-5:0.01:5;
y1=sin(t);
y2=cos(t);
y3=0;
plot(t,y1,t,y2,t,y3,y3,t);
ylim([-2,2])
text(1,0.5403,'\leftarrowcos(x)');
text(2,0.9093,'\leftarrowsin(x)');
text(0,0,' 0');