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    Any maths whizz here?

    The topics are periodicity (trig) , fourier tranformation, and power energy.
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    (Original post by LostGear)
    Any maths whizz here?

    The topics are periodicity (trig) , fourier tranformation, and power energy.
    Maths wizz checking in
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    (Original post by Slowbro93)
    Maths wizz checking in
    Haha yay!

    I have got a few questions, but you don't need to answer them all

    Periodicity
    1. Find the period of x(t) = 2 |cos t|
    2. Find the period of x(t) = 8 cos 2 t

    Power energy
    3. Find the energy of x(t) = e -at u(t)

    4. Find the power of the signal


    Fourier Transform

    5. Obtain the Fourier transform of the function f(t) = cost + 2cos4t

    6. Obtain the Fourier transform of the function f(t) = sint cos2t

    7. Obtain the Fourier transform of the function f(t) = cos 2 t
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    (Original post by LostGear)
    Haha yay!

    I have got a few questions, but you don't need to answer them all

    Periodicity
    1. Find the period of x(t) = 2 |cos t|
    2. Find the period of x(t) = 8 cos 2 t

    Power energy
    3. Find the energy of x(t) = e -at u(t)

    4. Find the power of the signal


    Fourier Transform

    5. Obtain the Fourier transform of the function f(t) = cost + 2cos4t

    6. Obtain the Fourier transform of the function f(t) = sint cos2t

    7. Obtain the Fourier transform of the function f(t) = cos 2 t
    Do you understand what periodicity is? For example, what is the periodicity for f(x)=sin(x)

    And what do you mean about Power signal?
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    (Original post by Slowbro93)
    Do you understand what periodicity is? For example, what is the periodicity for f(x)=sin(x)

    And what do you mean about Power signal?
    2pi? Periocity is when a function repeats over and over again. In your example, the function f(X) = SIN(X) repeats 2pi?

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    (Original post by LostGear)
    2pi? Periocity is when a function repeats over and over again. In your example, the function f(X) = SIN(X) repeats 2pi?

    Well by definition, a function has a period a when f(x+a)=f(x)

    So how can this be applicable?

    In addition, what have you tried in terms of working out?
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    (Original post by Slowbro93)
    Well by definition, a function has a period a when f(x+a)=f(x)

    So how can this be applicable?

    In addition, what have you tried in terms of working out?
    I have had no luck!

    I would appreciate if you could help me with the fourier transform questions
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    (Original post by LostGear)
    I have had no luck!

    I would appreciate if you could help me with the fourier transform questions
    Right, do you know what the equation for a fourier transform is? Let's start from there
 
 
 
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