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Math Help - trigo

  1. #1
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    trigo

    how to do this:
    x=0.7*cos(2*pi*200*t);
    y=0.5*cos(2*pi*1000*t);
    z=x+y;
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  2. #2
    MHF Contributor red_dog's Avatar
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    \cos(2k\pi)=1,\forall k\in\mathbf{Z}
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  3. #3
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    not help

    i need how the way to get one result
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  4. #4
    MHF Contributor red_dog's Avatar
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    What is t? Is integer, rational, real?
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  5. #5
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    real

    x1=07*cos(2*pi*200*t);
    x2=07*cos(2*pi*1000*t);

    i need toknow how i do x1+x2
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  6. #6
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by jsampaio View Post
    i need how the way to get one result
    What result? What exactly is your question? Solve for z, solve for t, graph the system, etc.

    -Dan
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  7. #7
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    Fourier

    is for then put that in fourier is because AM signal modulation.
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  8. #8
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by jsampaio View Post
    x1=07*cos(2*pi*200*t);
    x2=07*cos(2*pi*1000*t);

    i need toknow how i do x1+x2
    cos(a) + cos(b) = 2cos \left ( \frac{a + b}{2} \right ) ~ cos \left ( \frac{a - b}{2} \right )

    -Dan
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