Partial Derivative with Respect to y of a*cos(xy)-y*sin(xy)

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SUMMARY

The partial derivative of the function a*cos(xy) - y*sin(xy) with respect to y is definitively calculated as -ax*sin(xy) - sin(xy) - xy*cos(xy). In this calculation, x is treated as a constant, which is a fundamental principle in partial differentiation. The user initially struggled with the term -sin(xy) but ultimately resolved the issue independently. This discussion highlights the importance of understanding the treatment of variables in partial derivatives.

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  • Understanding of partial derivatives in multivariable calculus
  • Familiarity with trigonometric functions and their derivatives
  • Knowledge of the product rule in differentiation
  • Basic algebraic manipulation skills
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  • Study the product rule for differentiation in depth
  • Learn about higher-order partial derivatives
  • Explore applications of partial derivatives in optimization problems
  • Review trigonometric identities and their derivatives for better understanding
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Homework Statement


Find the partial derivative of a*cos(xy)-y*sin(xy) with respect to y.

Homework Equations


None.

The Attempt at a Solution


The answer is -ax*sin(xy)-sin(xy)-xy*cos(xy).
I know that I need to treat x as constant since I need to take the partial derivative with respect to y. But I don't know how to get -sin(xy). I know how to get -ax*sin(xy) and -xy*cos(xy).
 
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Never mind. I got it.
 
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