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    pradnya patil's Avatar
    pradnya patil Posts: 1, Reputation: 1
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    #1

    Oct 24, 2009, 09:42 PM
    trigomentric rations
    prove that sin2x/1+cos2x=tanx
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Oct 24, 2009, 11:34 PM

    1. Convert your double angles into single angles.

    Make use of:





    You have to choose which one concerning the double angle for cos you want to use. The answer then comes by itself.

    Give it a try now. :)
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