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11th grade

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verify the identity sin(4u)=2sin(2u)cos(2u)

  • 11th grade -

    LS
    =sin(4u)
    = sin(2u + 2u)
    = sin(2u)cos(2u) + cos(2u)sin(2u)
    = 2sin(2u)cos(2u)
    = RS

  • 11th grade -

    Good

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