[研习]轨迹图-星星
关键参数
A=((sin(5 α)+5) cos(α),(sin(5 α)+5) sin(α))
D=((sin(n α)+n) cos(a α),(sin(n α)+n) sin(a α))
loc2=轨迹(D,α)
d=曲线(((sin(n α)+n) cos(a α),(sin(n α)+n) sin(a α)),α,0,2 π)
轨迹loc2与曲线d图形相同
若+0，并扩大n倍，则曲线交于中心点
D=n ((sin(n α)+0 n) cos(a α),(sin(n α)+0 n) sin(a α))
变式
e=曲线((n (sin(a α)+0 n) cos(n α+n),n (sin(a α)+0 n) sin(n α+n)),α,0,2 π)