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    rarndt's Avatar
    rarndt Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Sep 26, 2009, 05:59 PM
    Trigonometric Identities
    Establish each Identity

    58. Sinxcosx tanx
    ________ = _______
    cos^2x - sin^2x 1- tan^2x

    60. Sinx - cosx +1 sinx + 1
    ___________ = _______
    sinx +cosx -1 cosx

    62. Secx - cosx sin^2x
    ___________ = _______
    secx + cosx 1+ cos^2x
    Lightning55's Avatar
    Lightning55 Posts: 97, Reputation: 7
    Junior Member
    		  
    #2

    Sep 26, 2009, 06:48 PM

    We are not here to do it for you. You want to tell us what you tried?

    If you do not know the identities, use this to help you:

    Table of Trigonometric Identities
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