anonymous
  • anonymous
Can someone help me with the following integral:
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
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anonymous
  • anonymous
int:sin(x)^3cos(x) use u substitution let u = sinx du =cosxdx new integral: int:u^3du =(1/4)u^4+C plug back in sinx for u sin^4(x)/4+c
anonymous
  • anonymous
http://integrals.wolfram.com/index.jsp?expr=sin%28x%29%5E3cos%28x%29&random=false

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anonymous
  • anonymous
that's what it looks like in better symbol form when finished. open for any questions
anonymous
  • anonymous
Thank you very much. I tryied so hard and I could not find the answer. Thank you so much
anonymous
  • anonymous
Your welcome, glad to help.
anonymous
  • anonymous
any others?
anonymous
  • anonymous
Yeah I have problem with three. well now two
anonymous
  • anonymous
can you help me with them?
anonymous
  • anonymous
Im just learning how to integrate
anonymous
  • anonymous
I can try, aha but i won't promise! ;P
anonymous
  • anonymous
in other words i'll do my best
anonymous
  • anonymous
let me post the other two
anonymous
  • anonymous
okay
anonymous
  • anonymous
Can you see it?
anonymous
  • anonymous
no....
anonymous
  • anonymous
Ok let me try again
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
what about now?
anonymous
  • anonymous
yeah i can see it, okay this one is a little more difficult . you have to use trigonometric identities
anonymous
  • anonymous
Do you think you can solve it?
anonymous
  • anonymous
let me think for a sec
anonymous
  • anonymous
ok :)
anonymous
  • anonymous
that's kind of a difficult one, however if you want to see all the steps.. i won't do them personally but here is something you can refer to
anonymous
  • anonymous
http://www.wolframalpha.com/widgets/view.jsp?id=dc816cd78d306d7bda61f6facf5f17f7
anonymous
  • anonymous
i guess it doesn't take you to the answer i put in, so just enter cos^7(x)
anonymous
  • anonymous
you can click see steps for indefinite integral.
anonymous
  • anonymous
are you sure that there isn't a sin, in your problem? that would make it so much easier
anonymous
  • anonymous
Im learning calculus so it will be awsome if you show me how to integrate with sin as well.
anonymous
  • anonymous
well i can do my best, i wasn't really able to help with the last one really though, if the integrand has sin and cos in it, that is easier
anonymous
  • anonymous
I think I found a way to solve it. I need to try a little bit harder. Any question I will let you know my friend
anonymous
  • anonymous
sounds good! good luck

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