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March 30, 2017

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Express sin4xcos3x as a sum or differences of sines and cosines

  • trig - ,

    use your product-to-sum formulas:

    sinAcosB = 1/2 (sin(A+B) + sin(A-B))
    sin4x cos3x = 1/2 (sin7x + sin(x))

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