?螺纹线t=1xt=4cos(t(5360))yt=4sin(t(5360))zt=6t蛇形线?t=1xt=2cos(t3603)tyt=2sin(t3603)tzt=(sqrt(sqrt(sqrt(t))))35?t=1r=t3theta=t3603zt=sqrt(t)7?t=1rho=360sqrt(t)2theta=t25phi=360t4?双余弦线t=1xt=-(9.56.5)t(9

?表示有N种方法?表示用UG3.0可以实现?双外摆线b=2.5l=2.5t=1xt=3bcos(t360)lcos(3t360)yt=3bsin(t360)lsin(3t360)?星形线a=5t=1xt=a(cos(360t))3yt=a(sin(360t))3叶形线a=10t=1xt=3at(1(t3))yt=3a(t2)(1(t3))?螺纹线t=1xt=4cos(t(5360))yt=4