E..3 1変数関数のグラフ

plot(x->sin(x),-3pi,3pi)
plot!(x->sin(2x)+cos(3x),-3pi,3pi)

plot([sin,cos],-3pi,3pi)
plot([x->sin(1000x),cos],-3pi,3pi)

plot([x->sin(100x),cos],-pi:pi/1000:pi)
plot(-pi:pi/1000:pi,[x->sin(100x),cos])