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    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #21

    Jul 13, 2012, 01:27 PM
    If you ended up with your proof, then sure! :D
    sally aa's Avatar
    sally aa Posts: 23, Reputation: 1
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    #22

    Jul 13, 2012, 01:28 PM
    Thank you :)
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #23

    Jul 13, 2012, 01:31 PM
    It wasn't that difficult, was it? ;)
    sally aa's Avatar
    sally aa Posts: 23, Reputation: 1
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    #24

    Jul 13, 2012, 01:38 PM
    no it wasn't
    but I thought that we can not cancel because we have 4sin^2(x) cos^2(x) and on the denominator we have 2 sin^2(x) we miss the cos^2(x) that's why I was stuck with this problem
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