x=acos^3 t y=asin^3 t
人气:355 ℃ 时间:2019-10-30 02:13:34
解答
x=acos^3 t y=asin^3 t
dy/dx=(dy/dt)/(dx/dt)
dy/dt=3asin^2 tcost
dx/dt=-3scos^2tsint
dy/dx=3asin^2 tcost/(-3scos^2tsint)
=-tant
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