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For the function f(x) = sinx*cosx the integral of it by u-substitution

  1. Oct 31, 2013 #1
    For the function f(x) = sinx*cosx the integral of it by u-substitution could be -(cosx)^2/2 or (sinx)^2/2, which one is right for an assignment or would I need to state both? Also for a person taking first year physics, what kinds of integration will I need to know past, integration by parts, and integration by substitution?
     
  2. jcsd
  3. Oct 31, 2013 #2

    Dick

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    Since -(cosx)^2/2+1/2=(sinx)^2/2 they are both fine, as long as you remember to add the '+C' part. That sounds like enough integration tricks. Maybe trig substitutions as well.
     
  4. Oct 31, 2013 #3
    Thanks for the help Dick!
     
    Last edited by a moderator: Oct 31, 2013
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