Having troubles getting this derivative

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SUMMARY

The discussion focuses on finding the derivatives dx/dt and dy/dt for the parametric equations x = sin(t) - tcos(t) and y = cos(t) + tsin(t). The correct derivatives are dx/dt = cos(t) + tsin(t) and dy/dt = -sin(t) + tcos(t). A key point emphasized is the importance of applying the product rule correctly during differentiation, which is crucial for accurate results.

PREREQUISITES
  • Understanding of parametric equations
  • Knowledge of differentiation rules, specifically the product rule
  • Familiarity with trigonometric functions and their derivatives
  • Basic calculus concepts
NEXT STEPS
  • Review the product rule in calculus
  • Practice differentiating parametric equations
  • Explore trigonometric derivatives in depth
  • Study applications of derivatives in physics and engineering
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Students studying calculus, particularly those focusing on parametric equations and differentiation techniques. This discussion is beneficial for anyone needing to solidify their understanding of the product rule and its applications in calculus.

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Homework Statement



find dx/dt and dy/dt


Homework Equations



x= sin(t)-tcos(t)

y=cos(t)+tsin(t)

The Attempt at a Solution



dx/dt= cos(t)-(-tsin(t)) = cos(t)+tsint

dy/dt=-sin(t)+tcost
 
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You're forgetting a minor detail. Recall the rules for differentiation, particularly products.
 

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