设x=cost y=sint-tcost 求dy/dx
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设x=cost y=sint-tcost 求dy/dx
设x=cost y=sint-tcost 求dy/dx
设x=cost y=sint-tcost 求dy/dx
dy/dx= y'/x'= tsint/(-sint)=-t
设x=cost y=sint-tcost 求dy/dx
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∫(x^2+y^2)ds,其中L为曲线x=a(cost+tsint),y=a(sint-tcost),(0
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1.求参量方程{x=a(cost+tsint),y=a(sint-tcost)}的二阶导数d^2y/dx^22.求曲线y=根号下x^2-1的斜渐进线
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{x=e右上角tcost,则 dy/dx = {y=e右上角tsint,不好意思大括号 打不出来,只好用两个括号{x=e右上角t cost, {y=e右上角t sint, 则 dy/dx = {,
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设x=cost,y=sint则(dy)/(dx)=