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।

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $4$

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यदि $u(x,y) = y \log x + x \log y$ है,तो ${u_x}{u_y} - {u_x} \log x - {u_y} \log y + \log x \log y = $

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यदि $f(x, y) = \frac{\cos(x - 4y)}{\cos(x + 4y)}$ है,तो $\left. \frac{\partial f}{\partial x} \right|_{y = \frac{x}{2}}$ का मान क्या होगा?

यदि $u = u(x, y) = \sin(y + ax) - (y + ax)^2$ है,तो निम्नलिखित में से कौन सा सत्य है?

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