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If tan−1 (x2 + y2) = a2, then find dy/dx. - Mathematics

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प्रश्न

If tan−1 (x2 + y2) = a2, then find `(dy)/(dx)`.

योग
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उत्तर

Given: tan−1 (x2 + y2) = a2

x2 + y2 = tan a2

Differentiate.w. r. t., x, we get

`2x + 2y(dy)/(dx) = 0`

⇒ `2y (dy)/(dx) = -2x`

⇒ `(dy)/(dx) = (-2x)/(2y)`

⇒ `(dy)/(dx) = (-x)/y`

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