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Math Help - Doubling the dimensions of a sin function

  1. #1
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    Doubling the dimensions of a sin function

    Hi,
    Can anyone tell me how to double the dimensions of a sin function?

    Thanks in advance.
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  2. #2
    Moo
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    Hello,
    Quote Originally Posted by overduex View Post
    Hi,
    Can anyone tell me how to double the dimensions of a sin function?

    Thanks in advance.
    What about 2 \sin(x) ?

    If for example, \sin(x)=\tfrac 12, then 2 \sin(x)=1\dots
    you can graph it somewhere and compare !


    not too sure about what you're asking actually
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    Quote Originally Posted by Moo View Post
    Hello,

    What about 2 \sin(x) ?

    If for example, \sin(x)=\tfrac 12, then 2 \sin(x)=1\dots
    you can graph it somewhere and compare !


    not too sure about what you're asking actually
    Well, I was told to double the dimensions of this equation:
    Y=6.984450432* sin (.3325x -2.205955718) +8.301540414
    In doubling the dimensions the x and y values should stay proportional to the original line. So my question was how would you go about doubling it?
    I wasn't sure if multipying the whole thing by 2 would work...
    I think I tend to ask confusing questions, sorry
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  4. #4
    Moo
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    Quote Originally Posted by overduex View Post
    Well, I was told to double the dimensions of this equation:
    Y=6.984450432* sin (.3325x -2.205955718) +8.301540414
    In doubling the dimensions the x and y values should stay proportional to the original line. So my question was how would you go about doubling it?
    I wasn't sure if multipying the whole thing by 2 would work...
    I think I tend to ask confusing questions, sorry
    Well multiply the coefficient in front of the sine. It changes the amplitude. And I think this is what looks more interesting for problems. (Green curve)
    The red curve is the original one.
    The blue curve is the original curve all multiplied by 2. Just here so that you can compare them.

    Doubling the dimensions of a sin function-sinus.jpg


    As for this thread and the other one, I suggest you have a look here : Amplitude and Period
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  5. #5
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    Quote Originally Posted by Moo View Post
    Well multiply the coefficient in front of the sine. It changes the amplitude. And I think this is what looks more interesting for problems. (Green curve)
    The red curve is the original one.
    The blue curve is the original curve all multiplied by 2. Just here so that you can compare them.

    Click image for larger version. 

Name:	sinus.JPG 
Views:	371 
Size:	47.5 KB 
ID:	9001


    As for this thread and the other one, I suggest you have a look here : Amplitude and Period
    Thanks for answering my questions! Now, just out of curiosity, what program did you use to graph the lines?
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  6. #6
    Moo
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    Quote Originally Posted by overduex View Post
    Thanks for answering my questions! Now, just out of curiosity, what program did you use to graph the lines?
    It can be found here : Graph
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