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Math Help - Fourier series question

  1. #1
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    Lightbulb Fourier series question

    Please help me out with this question, im lost.

    Cheers
    Attached Thumbnails Attached Thumbnails Fourier series question-mathq20.png  
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  2. #2
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    Re: Fourier series question

    Quote Originally Posted by Brennox View Post
    Please help me out with this question, im lost.

    Cheers
    For the first question look up the definition of Fourier series given in your notes or text book.

    For question 2 apply the correct answer to question 1 to the given function.

    If you are still having trouble post what yuou have done and what the problem is for further help.

    .
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  3. #3
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    Re: Fourier series question

    Quote Originally Posted by zzephod View Post
    For the first question look up the definition of Fourier series given in your notes or text book.

    For question 2 apply the correct answer to question 1 to the given function.

    If you are still having trouble post what yuou have done and what the problem is for further help.

    .
    So ive worked out that the answer is B for part one, the one with 1/(pi) in front

    can you help me out with the 2nd part, cheers
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  4. #4
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    Re: Fourier series question

    Quote Originally Posted by zzephod View Post
    For the first question look up the definition of Fourier series given in your notes or text book.

    For question 2 apply the correct answer to question 1 to the given function.

    If you are still having trouble post what yuou have done and what the problem is for further help.

    .
    I have found out i need to do this... SF_f(x) = a_0/2 + a_1 cos(x) + a_2 cos(2x) + b_1 sin(x) + b_2 sin(2x)

    i got SF_f(x) = a_0/2 + 18 + 0 + 0 + 0

    is this right? i tried 18, 22.5 and 27 all wrong answer
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