1.construct the graph of sin(x) with x ranging in [0,2 p ]. 　
　notice:1.scaling=constrained(表兩坐標軸單位等長)
　　　 2.axes=none(表不畫坐標軸)
2.Draw a circle given by the parametric equations x=cos(t),y=sin(t),t e [0,2p]
3.Draw the graphs of the first six Chebyshev polynomials in the interval [- 　1,1].
4.Draw this pretty leaf
5.Draw the graphs of the polynomials given by the binomial expansions

6.Construct this pattern of the "sunflower"
7.Construct the graph given in polar coordinates by r=cos(7t/2)+1/4 ,t e [0,4 　p ]
8.Construct this interesting drawing
9.Construct this interesting drawing
10.Construct this interesting pattern
11.Construct a gif file animating the function f(x,t)=sin(x+t) and include the 　gif in your web page.
12.因式分解2^257-1

plot(sin(x),x=0..2*Pi);