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Math Help - Some trig questions part 3

  1. #1
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    Some trig questions part 3

    Please help.

    7) cos(sin^-1 3/5)
    8) 1-tan^2 65deg=csc^2 25deg
    Last edited by mr fantastic; April 27th 2009 at 07:32 PM. Reason: Moved from original thread
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  2. #2
    Member SengNee's Avatar
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    Quote Originally Posted by donnyB View Post
    Please help.

    7) cos(sin^-1 3/5)
    8) 1-tan^2 65deg=csc^2 25deg


    7) cos(sin^-1 3/5)




    8) 1-tan^2 65deg=csc^2 25deg

    Should be like below.
    1+\tan^{2}65^o = \csc^{2}25^o
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