If `u= tan^(-1) ((x^(3) + y^(3))/(x-y))`, Prove that `x(del u). | Class 12 MATH | Doubtnut

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If `u= tan^(-1) ((x^(3) + y^(3))/(x-y))`, Prove that `x(del u)/(del x) + y(del u)/(del y) = sin 2u`.

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