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Using implicit differentiation, find 
(dy)/(dx).

y cos(3x+5y)=-3xy-3

Using implicit differentiation, find dydx \frac{d y}{d x} .\newlineycos(3x+5y)=3xy3 y \cos (3 x+5 y)=-3 x y-3

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Q. Using implicit differentiation, find dydx \frac{d y}{d x} .\newlineycos(3x+5y)=3xy3 y \cos (3 x+5 y)=-3 x y-3
  1. Given Equation: We are given the equation ycos(3x+5y)=3xy3y \cos(3x+5y)=-3xy-3 and we need to find the derivative of yy with respect to xx using implicit differentiation.
  2. Implicit Differentiation: Differentiate both sides of the equation with respect to xx. Remember to use the product rule for ycos(3x+5y)y \cos(3x+5y) and the chain rule for cos(3x+5y)\cos(3x+5y) since yy is a function of xx.
  3. Left Side Differentiation: Differentiating the left side ycos(3x+5y)y \cos(3x+5y) with respect to xx gives us:ycos(3x+5y)ysin(3x+5y)(3+5y)y' \cos(3x+5y) - y \sin(3x+5y) (3 + 5y'), where yy' denotes dydx\frac{dy}{dx}.
  4. Right Side Differentiation: Differentiating the right side 3xy3-3xy-3 with respect to xx gives us:3y3xy-3y - 3xy'.
  5. Combine Equations: Now we have the equation: ycos(3x+5y)ysin(3x+5y)(3+5y)=3y3xy.y' \cos(3x+5y) - y \sin(3x+5y) (3 + 5y') = -3y - 3xy'.
  6. Isolate yy': We need to solve for yy'. To do this, we'll collect all terms involving yy' on one side of the equation and the rest on the other side.
  7. Rearrange Terms: Rearrange the terms to isolate yy':ycos(3x+5y)+ysin(3x+5y)5y3xy=3yysin(3x+5y)3y' \cos(3x+5y) + y \sin(3x+5y) \cdot 5y' - 3xy' = -3y - y \sin(3x+5y) \cdot 3.
  8. Factor Out yy': Factor out yy' from the left side of the equation:\newliney(cos(3x+5y)+5ysin(3x+5y)3x)=3y3ysin(3x+5y)y' (\cos(3x+5y) + 5y \sin(3x+5y) - 3x) = -3y - 3y \sin(3x+5y).
  9. Divide to Solve for yy': Divide both sides by (cos(3x+5y)+5ysin(3x+5y)3x)(\cos(3x+5y) + 5y \sin(3x+5y) - 3x) to solve for yy':y=3y3ysin(3x+5y)cos(3x+5y)+5ysin(3x+5y)3x.y' = \frac{-3y - 3y \sin(3x+5y)}{\cos(3x+5y) + 5y \sin(3x+5y) - 3x}.
  10. Final Derivative: Now we have the derivative of yy with respect to xx: dydx=y=3y3ysin(3x+5y)cos(3x+5y)+5ysin(3x+5y)3x\frac{dy}{dx} = y' = \frac{-3y - 3y \sin(3x+5y)}{\cos(3x+5y) + 5y \sin(3x+5y) - 3x}.

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