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Proofs for Sin + Cos Rules.

  • 03-03-2013 9:50am
    #1
    Registered Users, Registered Users 2 Posts: 2,087 ✭✭✭


    Does anyone have proofs for the sin/cos rule that can be printed? I've searched for ages but I can't find anything. (The only thing I could find was a PDF that cost $12 to access the site for the day...) Thank you c:


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