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

    Jan 19, 2008, 09:24 AM
    lPlane Trigonometry
    Simplify the following :

    sin(90° +x ) sin(18o° + x ) + cos (90° + x ) cos (180° -x )


    And solve the following right triangle by logarithms :

    A= 28° 30' , b = 18.3

    I have already solved the above problems but I need a check !
    PolluxCastor's Avatar
    PolluxCastor Posts: 117, Reputation: 5
    Junior Member
    		  
    #2

    Jan 19, 2008, 09:54 AM
    Well, then show me what you did.
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