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    pined.af's Avatar
    pined.af Posts: 1, Reputation: 1
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    #1

    May 10, 2011, 11:07 PM
    draw the graph, plot all x-intercepts, minima, and maxima?
    Graph the function y=2cos((1/(2)x))
    To draw the graph, plot all x-intercepts, minima, and maxima within one period.
    Newton1Law's Avatar
    Newton1Law Posts: 60, Reputation: 5
    Junior Member
    		  
    #2

    May 11, 2011, 08:23 AM
    Your formula is less than clear. If I assume that it is y =2*cos(0.5*x), it becomes a coseine wave form that goes from +2 to -2 in magnitude with two maximums of 2 at o degrees and 720 degrees, one minimum at 360 degrees. X intercepts at 180 and 540 degrees.

    If your formula is y=2*cos(1/(2*x)), there are three miimums of -2 at 0,3 & 9 degrees, maximums at about 2 and 4.85 degrees, zero crossings at 3.65, 6.1 and 18.25 degrees and last but not least an asymptotic to near 2 very near 200 degrees out to infinity.
    jcaron2's Avatar
    jcaron2 Posts: 986, Reputation: 204
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    #3

    May 11, 2011, 06:58 PM
    Comment on Newton1Law's post
    For some stupid reason, I accidentally hit the "No" feedback button, instead of "Yes". Hopefully hitting "Yes" afterwards undoes my mistake. At any rate, good answer. Given that the question seems to indicate that the function is periodic, I'm guessing your first interpretation was the right one.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    May 12, 2011, 10:33 AM

    Yep, the rating is positive. Somehow, it worries me a little, but in times like this, it's indeed handy.
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