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Integral of trig functions

  1. Dec 11, 2009 #1
    how do i integrate -- cosx/((sinx)^2 + 1) with respect to x
    thanks for your help
     
  2. jcsd
  3. Dec 11, 2009 #2

    arildno

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    Set u=sin(x)
     
  4. Dec 11, 2009 #3
    oh wow , why didnt i think of that ?
    thanks alot:surprised
     
  5. Dec 12, 2009 #4
    what is the integral of ∫ cosx/(sinx)^9 with respect to x.
    i think this one is a bit challenging
     
  6. Dec 12, 2009 #5

    nicksauce

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    Just let u = sin(x) again...
     
  7. Dec 14, 2009 #6
    how about integral of 10^x with respect to x
     
  8. Dec 14, 2009 #7
    write [itex]10^x = e^{xln10}[/itex]
     
  9. Dec 15, 2009 #8

    arildno

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    Or, set u=10^x
     
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