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Reyjuanx10

ʃsin 3x sin 6x dx

  • 11 months ago
  • 11 months ago

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  1. ajprincess
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    r u familiar with this formula? cosc-cosd=2sin(c+d)/2sin(d-c)/2? here c=A+B and d=A-B

    • 11 months ago
  2. Reyjuanx10
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    hmmm I'd prefer to use identities. I can't seem find an identity for sin 6x

    • 11 months ago
  3. phi
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    how about the double angle sin(2x) = 2 sin(x) cos(x)

    • 11 months ago
  4. ajprincess
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    u can use the one i showed. cosc-cosd=2sin(d-c)/2sin(c+d)/2 c+d/2=6x c-d/2=3x u can find c and d from this

    • 11 months ago
  5. ajprincess
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    (c+d)/2=6x (c-d)/2=3x

    • 11 months ago
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