Chain Rule

  • Thread starter dalcde
  • Start date
  • #26
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That doesn't seem to work for all functions. Let f(x)=tan x. Then using that formula, we will get the tangent of pi/2 to be something like 3.8264459099620716 ( here )
The precondition is that the function is differentiable in the entire interval that is used.
In your example the function is not differentiable in pi/2.
 

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