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Math Help - derive the law of cosines

  1. #1
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    derive the law of cosines

    how is it again that you would derve the law of cosines?

    i do know that it starts out like the distance formula.

    help plz
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Jnoobs View Post
    how is it again that you would derve the law of cosines?

    i do know that it starts out like the distance formula.

    help plz
    make google your friend. see the proofs section here (the very first link that came up when i googled "law of cosines." you may find other links if this is not to your liking)
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