jayvickPaLoll jayvickPaLoll
  • 26-11-2016
  • Mathematics
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Find the second derivative of f(x) = sec(pix)

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Nirina7
Nirina7 Nirina7
  • 30-11-2016
 the main formula is (1/u)' = - u' / u²
f(x) = sec(pix) = 1/ cospix,    f ' (x) =  (1/ cospix)' =  pi sinpix /  cos²pix

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