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    kileemarie's Avatar
    kileemarie Posts: 1, Reputation: 1
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    #1

    Apr 3, 2007, 04:08 PM
    Proving Trigonometric Identities
    How would you prove:

    (1-tan theta) squared= sec squared theta -2 tan theta
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Apr 3, 2007, 05:00 PM
    This isn't a bad one by comparison.

    Exapnd out and look at it.



    Now, what does equal?
    kartikey sharma's Avatar
    kartikey sharma Posts: 1, Reputation: 1
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    #3

    Dec 29, 2007, 02:55 AM
    (1-tan theta) squared = sec squared theta - 2 tan theta
    1 + tan square theta - 2 tan theta
    sec square theta - 2 tan theta
    [since 1+tan square theta = sec square theta]
    chambawi's Avatar
    chambawi Posts: 2, Reputation: 1
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    #4

    Aug 26, 2010, 06:34 PM
    cot theta + (sin theta/1+cos theta)= csc theta
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #5

    Aug 27, 2010, 08:44 AM

    Could you avoid double posting please?

    I already answered your question here
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