What is the Chain Rule for Differentiating tan^3(x) + tan(x^3)?

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SUMMARY

The discussion focuses on differentiating the function tan^3(x) + tan(x^3) using the chain rule. The correct derivative for tan^3(x) is derived as 3tan^2(x)sec^2(x), while the derivative for tan(x^3) is identified as sec^2(x^3) * 3x^2. The user emphasizes the need for clarity in applying the chain rule, particularly in identifying the inner and outer functions.

PREREQUISITES
  • Understanding of the chain rule in calculus
  • Familiarity with trigonometric derivatives, specifically for tangent and secant functions
  • Knowledge of basic differentiation techniques
  • Ability to manipulate composite functions
NEXT STEPS
  • Study the application of the chain rule in differentiating composite functions
  • Review the derivatives of trigonometric functions, focusing on tan(x) and sec(x)
  • Practice problems involving the differentiation of polynomial and trigonometric combinations
  • Explore advanced differentiation techniques, such as implicit differentiation
USEFUL FOR

Students studying calculus, particularly those focusing on differentiation techniques, as well as educators seeking to clarify the application of the chain rule in complex functions.

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Homework Statement



tan^3(x) + tan(x^3)

Homework Equations





The Attempt at a Solution



tan^3(x) + sec^2(x^3) + 3x^2


Im not sure how to do the tan^3(x) and not even sure I did the tan(x^3) right
 
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the first term is as follows
\frac{d}{dx} (tan(x))^3 = 3 tan^2(x)\frac{d (tan(x))}{dx} =..

here assume you have
g(x) = x^3
f(x) = tan(x)

and you know
g(x) = 3x^2
f(x) = sec(x)

in this form it becomes
g(f(x)) = (tan(x))^3 =..

\frac{d}{dx} g(f(x)) = g'(f(x))f'(x) = ...

finish this & try the 2nd term again as its not correct either
 
expanded above
 

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