reggie98
reggie98 reggie98
  • 16-02-2017
  • Mathematics
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How to derive: f(w)=ln(cos(w-1))

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LammettHash
LammettHash LammettHash
  • 16-02-2017
The word you're looking for is "differentiate", not "derive".

[tex]\dfrac{\mathrm d}{\mathrm dw}\ln(\cos(w-1))=\dfrac{\frac{\mathrm d}{\mathrm dw}\cos(w-1)}{\cos(w-1)}=\dfrac{-\sin(w-1)\frac{\mathrm d}{\mathrm dw}(w-1)}{\cos(w-1)}=-\dfrac{\sin(w-1)}{\cos(w-1)}=-\tan(w-1)[/tex]
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