Local Linearization of f(x) = cosx at a = $\pi$/2

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SUMMARY

The discussion focuses on the local linearization of the function f(x) = cos(x) at the point a = π/2. The correct linearization formula is derived as L(x) = -x + π/2, utilizing the derivative f'(x) = -sin(x) evaluated at a = π/2. The participant confirms the accuracy of their result, indicating a successful application of linear approximation techniques.

PREREQUISITES
  • Understanding of calculus concepts, specifically derivatives
  • Familiarity with the function f(x) = cos(x)
  • Knowledge of linear approximation methods
  • Ability to evaluate trigonometric functions at specific points
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  • Study the concept of Taylor series for more advanced approximations
  • Learn about the applications of linearization in real-world problems
  • Explore the implications of local linearization in optimization
  • Investigate the behavior of other trigonometric functions under linearization
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Students and educators in calculus, mathematicians interested in approximation techniques, and anyone looking to deepen their understanding of linearization in mathematical analysis.

Mirole
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f(x) = cosx, a = \pi/2
since, L(x)=f'(x)(x-a) -f(a)
f'(x) = -sinx
= -sin(\pi/2)(x-\pi/2) - f(a)


I'm stuck as to where to go next, is this even right?
 
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Nevermind, I got it to be -x+\pi/2, which is correct!
 

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