જો $f(x, y) = \frac{\cos(x - 4y)}{\cos(x + 4y)}$ હોય, તો $\left. \frac{\partial f}{\partial x} \right|_{y = \frac{x}{4}}$ ની કિંમત શોધો:

  • A
    -$1$
  • B
    $0$
  • C
    $1$
  • D
    $2$

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Similar Questions

જો $u=\sin ^{-1}\left(\frac{x^4+y^4}{x+y}\right)$ હોય,તો $x \frac{\partial u}{\partial x}+y \frac{\partial u}{\partial y}$ ની કિંમત શોધો.

જો $z = \frac{y}{x} \left[ \sin \frac{x}{y} + \cos \left( 1 + \frac{y}{x} \right) \right]$ હોય, તો $x \frac{\partial z}{\partial x}$ કોના બરાબર થાય?

જો $u=\log \left(x^3+y^3+z^3-3 x y z\right)$ હોય,તો $(x+y+z)(u_x+u_y+u_z)$ ની કિંમત શોધો.

જો $u = \sin^{-1}\left(\frac{x}{y}\right) + \tan^{-1}\left(\frac{y}{x}\right)$ હોય, તો $x \frac{\partial u}{\partial x} + y \frac{\partial u}{\partial y}$ નું મૂલ્ય શું થાય?

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