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y-sec-n-cos-n-x-sec-cos-xy-x-2-y-2-y-




Question Number 183447 by greougoury555 last updated on 26/Dec/22
  { ((y=sec^n θ−cos^n θ)),((x=sec θ−cos θ)) :}   xy ′+(x^2 +y^2 )y′′ =?
{y=secnθcosnθx=secθcosθxy+(x2+y2)y=?

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