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Math Help - complete identity

  1. #1
    Junior Member
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    complete identity

    sin^2A-1/sinA+1 = ?

    I'm so confused. Is it cos^2A?
    Thanks much.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by daydreembelievr View Post
    sin^2A-1/sinA+1 = ?

    I'm so confused. Is it cos^2A?
    Thanks much.
    Use brackets so we don't have to guess at what you question really is.

    \frac{\sin^2(A)-1}{\sin(A)+1}=\frac{(\sin(A)+1)(\sin(A)-1)}{\sin(A)+1}

    does that help?

    CB
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  3. #3
    Junior Member
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    wow

    obviously. i was trying to make that so difficult. I was plugging in cos and everything else imaginable. thanks so much for the help.
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