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Question Details Asked By Asked On
Identity ontadian 01/27/04
    Prove that sin^2(x)+sin^2(2x)+sin^2(3x) =
    2-2cos(x)*cos(2x)*cos(3x)

Summary of Answers Received Answered On Answered By Average Rating
1. ont..... Still looking at your other question, but for this...
01/28/04 blutoExcellent or Above Average Answer
2. We use the identities sin^2 A = (1 - cos(2A))/2 cos A +...
04/19/04 MathMaven53Excellent or Above Average Answer
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