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anonymous

  • 5 years ago

integrate x.cos(2x^3 +1)

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  1. anonymous
    • 5 years ago
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    hmm what have you tried so far?

  2. anonymous
    • 5 years ago
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    I was going to say substitution but that still doesn't fixed the problem

  3. anonymous
    • 5 years ago
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    x=u cos(2x^3+1)dx= dv 1dx=du but then I cant figure out the integration of cos(2x^3+1)

  4. anonymous
    • 5 years ago
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    no I was going to say u = 2 x^3 + 1 and du= 6x^2 gives you sin(u) x/6 du but you still have an x there

  5. anonymous
    • 5 years ago
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    thank you i've managed I said U=2x^3+1 then it all came up thanx

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