设x=cost y=sint-tcost 求dy/dx

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设x=cost y=sint-tcost 求dy/dx
x){n_mr~qBmqf^n lcSJ~JMR>A5v6ęf*TW*k(M[<;yds

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