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Math Help - Rewriting Pythgorean ID...

  1. #1
    Junior Member
    Joined
    Oct 2008
    Posts
    39

    Rewriting Pythgorean ID...

    Just wanted to check if this was a "legal" move...

    I know that Tan^2+1 = Sec^2...So, is it right to say 1-Tan^2= -Sec^2
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  2. #2
    Newbie
    Joined
    Dec 2009
    Posts
    18
    That would be more like -tan^2-1=-sec^2.

    1-Tan^2= -Sec^2 isn't right.
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