Integrating $\cos(mx)$ with Two Variables

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SUMMARY

The discussion focuses on the integration of the function $$\int x^2\cos(mx)\,dx$$ using integration by parts. In this context, $x^2$ is designated as $u$ and $\cos(mx)\,dx$ as $dv$. It is clarified that when integrating with respect to $x$, the variable $m$ is treated as a constant unless it is explicitly defined as a function of $x$. This distinction is crucial for correctly applying integration techniques.

PREREQUISITES
  • Understanding of integration by parts
  • Familiarity with trigonometric functions, specifically cosine
  • Knowledge of variable treatment in calculus
  • Basic proficiency in handling integrals with multiple variables
NEXT STEPS
  • Study the method of integration by parts in depth
  • Explore the properties of trigonometric integrals
  • Learn about the implications of treating constants in integration
  • Investigate advanced integration techniques involving multiple variables
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Students and professionals in mathematics, particularly those studying calculus and integration techniques, as well as educators looking to enhance their understanding of integration with variable parameters.

thereidisanceman
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$$\int x^2\cos(mx)\,dx$$

When integrating this by parts, the $x^2$ will become the $u$ and the $\cos(mx)\,dx$ will become $dv$.

How is the $\cos(mx)$ integrated if there are two variables?
 
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You are integrating with respect to $x$, and unless $m$ is a function of $x$, then you treat it as a constant. :D
 

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