Product rule with chain rule (derivation wrt time)

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SUMMARY

The discussion focuses on finding the derivative of the equation 0 = 3xcosƟ with respect to time using the product rule. The correct application involves differentiating both components, where the constant 3 remains unchanged. The final derivative expression is confirmed as 0 = 3x(-sinƟ)(dƟ/dt) + 3(dx/dt)(cosƟ).

PREREQUISITES
  • Understanding of calculus, specifically differentiation techniques.
  • Familiarity with the product rule in calculus.
  • Knowledge of trigonometric functions and their derivatives.
  • Basic understanding of derivatives with respect to time.
NEXT STEPS
  • Study the product rule in more depth, including examples and applications.
  • Learn about the chain rule and its relationship with the product rule.
  • Explore trigonometric derivatives, focusing on sinƟ and cosƟ.
  • Practice solving derivatives of equations involving constants and variables.
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Students and professionals in mathematics, physics, and engineering who are learning or applying calculus, particularly in contexts involving derivatives with respect to time.

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I'm trying to find the derivative of 0 = 3xcosƟ with respect to time.

I know I should use the product rule for x and cosƟ. But I don't know what I should do with the constant 3.

would it be like this?

0 = 3x(-sinƟ)(dƟ/dt) + 3(dx/dt)(cosƟ)
 
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Yes, that's correct.
 
thank you
 

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