What is the derivative of a complex function?

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    Derivative Function
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SUMMARY

The derivative of the complex function y = (x^3/2)(sinxcosx)^2 is confirmed to be (x^3/2)(2sinxcosx)(cos^2x - sin^2x) + (3sqrt(x)/2)(sinxcosx)^2. However, the derivative simplifies significantly when recognizing that sinxcosx can be expressed as 1/2sin2x. The application of the product rule and chain rule is essential in deriving the correct expression. This discussion validates the use of these calculus techniques in simplifying complex derivatives.

PREREQUISITES
  • Understanding of calculus, specifically differentiation techniques
  • Familiarity with the product rule and chain rule in calculus
  • Knowledge of trigonometric identities, particularly sinxcosx = 1/2sin2x
  • Ability to manipulate algebraic expressions involving powers and trigonometric functions
NEXT STEPS
  • Study the application of the product rule in calculus
  • Learn about the chain rule and its applications in complex functions
  • Explore trigonometric identities and their use in simplifying derivatives
  • Practice differentiating complex functions involving products of polynomials and trigonometric functions
USEFUL FOR

Students of calculus, mathematics educators, and anyone interested in mastering differentiation techniques for complex functions.

PrudensOptimus
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What is the derivative of

y = (x^3/2)(sinxcosx)^2

is it

(x^3/2)(2sinxcosx)(cos^2x - sin^2x) + (3sqrt(x)/2)(sinxcosx)^2 ?
 
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yes, I get that answer too
but the derivative becomes easier and neater if you notice that sinxcosx=1/2sin2x
 


Yes, that is the correct derivative of the given function. The first term in your answer is the product rule applied to the first two factors, and the second term is the derivative of the third factor using the chain rule. Well done!
 

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