यदि $u = \sin^{-1}\left(\frac{x}{y}\right) + \tan^{-1}\left(\frac{y}{x}\right)$ है, तो $x \frac{\partial u}{\partial x} + y \frac{\partial u}{\partial y}$ का मान क्या है?

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    इनमें से कोई नहीं

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यदि $z = \sec^{-1}\left(\frac{x^4+y^4-8x^2y^2}{x^2+y^2}\right)$ है, तो $x \frac{\partial z}{\partial x} + y \frac{\partial z}{\partial y}$ का मान ज्ञात कीजिए।

यदि $u = x y^2 \tan^{-1}\left(\frac{y}{x}\right)$ है,तो $x \frac{\partial u}{\partial x} + y \frac{\partial u}{\partial y}$ का मान ज्ञात कीजिए।

यदि $z=\log (\tan x+\tan y)$ है,तो $(\sin 2 x) \frac{\partial z}{\partial x}+(\sin 2 y) \frac{\partial z}{\partial y}$ का मान ज्ञात कीजिए।

यदि $u=e^{x^2-y^2}$ है,तो

यदि $z = \sin^{-1}\left( \frac{x+y}{\sqrt{x} + \sqrt{y}} \right)$ है,तो $x\frac{\partial z}{\partial x} + y\frac{\partial z}{\partial y}$ का मान ज्ञात कीजिए।

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