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    Arkious's Avatar
    Arkious Posts: 4, Reputation: 1
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    #1

    Jun 16, 2008, 02:57 AM
    Trigometric tables and graphics
    Hi,

    I have a question on one of my assignments that I do not understand, I have looked through all my work on mathematics but have not found anything to do with this. I have the question...

    Produce a table of values for the function F(θ) = 100.sin(θ) + 20.SIN(3.θ) for the values of θ from 0' to 180' (in 15' steps). Draw the graph of F (θ) against θ and from this determine the peak value of the wave form and the angles at which this occurs.

    Please point me in the right direction, as at the moment I don't even know where to start. If possible please don't give me the answers but advice on what it means and how to start it please :-)

    Thanks
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Jun 16, 2008, 03:45 AM
    This is rather straight forward. Just enter values into your given equation and write them down.

    i.e.

    100sin(0)+20sin(3(0))=0

    100sin(15)+20sin(3(15))=40.02...

    100sin(30)+20sin(3(30))=70

    And so forth until you reach 100sin(180)+20sin(540)

    That's all there is to it. Then see where the highest point lies.

    Compare that to the derivative. Graph the function. That always helps.
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    Arkious's Avatar
    Arkious Posts: 4, Reputation: 1
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    #3

    Jun 16, 2008, 04:38 AM
    Thanks very much mate, that helped me a lot! Something so simple now I look at it but I really didn't know where to start. Thanks again!
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