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anonymous

  • 4 years ago

Can someone help me with the following integral:

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  1. anonymous
    • 4 years ago
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  2. anonymous
    • 4 years ago
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    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

  3. anonymous
    • 4 years ago
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    http://integrals.wolfram.com/index.jsp?expr=sin%28x%29%5E3cos%28x%29&random=false

  4. anonymous
    • 4 years ago
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    that's what it looks like in better symbol form when finished. open for any questions

  5. anonymous
    • 4 years ago
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    Thank you very much. I tryied so hard and I could not find the answer. Thank you so much

  6. anonymous
    • 4 years ago
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    Your welcome, glad to help.

  7. anonymous
    • 4 years ago
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    any others?

  8. anonymous
    • 4 years ago
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    Yeah I have problem with three. well now two

  9. anonymous
    • 4 years ago
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    can you help me with them?

  10. anonymous
    • 4 years ago
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    Im just learning how to integrate

  11. anonymous
    • 4 years ago
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    I can try, aha but i won't promise! ;P

  12. anonymous
    • 4 years ago
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    in other words i'll do my best

  13. anonymous
    • 4 years ago
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    let me post the other two

  14. anonymous
    • 4 years ago
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    okay

  15. anonymous
    • 4 years ago
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    Can you see it?

  16. anonymous
    • 4 years ago
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    no....

  17. anonymous
    • 4 years ago
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    Ok let me try again

  18. anonymous
    • 4 years ago
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  19. anonymous
    • 4 years ago
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    what about now?

  20. anonymous
    • 4 years ago
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    yeah i can see it, okay this one is a little more difficult . you have to use trigonometric identities

  21. anonymous
    • 4 years ago
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    Do you think you can solve it?

  22. anonymous
    • 4 years ago
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    let me think for a sec

  23. anonymous
    • 4 years ago
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    ok :)

  24. anonymous
    • 4 years ago
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    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

  25. anonymous
    • 4 years ago
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    http://www.wolframalpha.com/widgets/view.jsp?id=dc816cd78d306d7bda61f6facf5f17f7

  26. anonymous
    • 4 years ago
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    i guess it doesn't take you to the answer i put in, so just enter cos^7(x)

  27. anonymous
    • 4 years ago
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    you can click see steps for indefinite integral.

  28. anonymous
    • 4 years ago
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    are you sure that there isn't a sin, in your problem? that would make it so much easier

  29. anonymous
    • 4 years ago
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    Im learning calculus so it will be awsome if you show me how to integrate with sin as well.

  30. anonymous
    • 4 years ago
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    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

  31. anonymous
    • 4 years ago
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    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

  32. anonymous
    • 4 years ago
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    sounds good! good luck

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