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    b0mboms's Avatar
    b0mboms Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Oct 19, 2012, 02:55 AM
    Simplify the trigonometric expression. Tan(x)/sec(-x)
    tan(x)/sec(-x)
    Rohin Arora's Avatar
    Rohin Arora Posts: 45, Reputation: 0
    Junior Member
    		  
    #2

    Oct 19, 2012, 03:45 AM
    sec(-x)=sec(x)
    so
    tan(x)/sec(-x)
    =tan(x)/sec(x)

    putting tan(x)=sin(x)/cos(x) and sec(x)=1/cos(x),we get

    =[sin(x)/cos(x)]/[1/cos(x)]
    =[sin(x)/cos(x)]*cos(x)
    =sin(x)


    I hope it helped.
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