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Math Help - Graphs of Sin(x) and Cos(x) question??

  1. #1
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    Graphs of Sin(x) and Cos(x) question??

    What is the amplitude, period and phase shift?

    I got the Period and Amplitude right.

    y=2sin(x-pie) +3
    |A| |2| =2 amplitude lies between -2 and 2 yaxis then vertical shift up 3 units

    period is 2Pie I did 2pie/1 which is 2 pie.

    Now for phase shift I did pie/2pie and on me answer page says answer is pie.
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  2. #2
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    Re: Graphs of Sin(x) and Cos(x) question??

    I got this one wrong to y=-2 cos(pie/2x+pie)
    Amplitude is 2
    Period 4
    Phase shift I had as -pie/4
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    Re: Graphs of Sin(x) and Cos(x) question??

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    Re: Graphs of Sin(x) and Cos(x) question??

    I think your amplitude is correct, but I think the phase shift is simply the additional factor within the sine function: -\pi

    We don't know the period.
    All we know is \omega t = 2 \pit/T = x.
    But we don't know \omega so we cannot calculate the period.
    All we can do is express T in the form T = (2 \pit)/x
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    Re: Graphs of Sin(x) and Cos(x) question??

    I made a mistake I divide by the period when Im supposed to divide the b part for the denominator y=Asin (Bx-C)+D
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    Re: Graphs of Sin(x) and Cos(x) question??

    Please have a look at the site
    Transformations of the Sine and Cosine Graphs
    the author has given good examples to make concept very clear.
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    Re: Graphs of Sin(x) and Cos(x) question??

    Quote Originally Posted by Melcarthus View Post
    y=2sin(x-pie) +3
    [rant]
    It's spelled "pi", not "pie." Get it right!
    [/rant]

    -Dan
    Thanks from Plato
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