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ifunfrank

[AP Cal] Evaluate the following definite integral

  • one year ago
  • one year ago

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  1. ifunfrank
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    \[\int\limits_{0}^{\frac{ \pi }{ 6 }}\cos 3xdx\]

    • one year ago
  2. him1618
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    put 3x=t

    • one year ago
  3. MarcLeclair
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    do you really need to use substitution here O_O?

    • one year ago
  4. MarcLeclair
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    oh nvm me hes right

    • one year ago
  5. ifunfrank
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    so do i use substitution method?

    • one year ago
  6. him1618
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    yes ys

    • one year ago
  7. him1618
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    3x=t 3dx=dt dx=dt/3 that makes it 1/3 x cost dt

    • one year ago
  8. ifunfrank
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    okay, i set 3x = u, now?

    • one year ago
  9. him1618
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    see above

    • one year ago
  10. ifunfrank
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    where is the x before cost coming from?

    • one year ago
  11. him1618
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    thst is mltiply

    • one year ago
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