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Math Help - periodic functions

  1. #1
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    Smile periodic functions

    Can anyone solve this??? i am so lost!

    Question 1

    a)
    State the amplitude (A) the period (T) and the frequency (F) for the periodic function - 120sin(100 pi t)V.

    b) Through how many degrees does a wheel rotate in 10 ms if its angular velocity is 8 rad/s.

    c) Sketch one cycle of the given function showing the values of each variable where the curve crosses the axis. V=50sin(4.2*10^2t)
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  2. #2
    Super Member 11rdc11's Avatar
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    Quote Originally Posted by GAVREED2 View Post
    Can anyone solve this??? i am so lost!

    Question 1

    a) State the amplitude (A) the period (T) and the frequency (F) for the periodic function - 120sin(100 pi t)V.

    b) Through how many degrees does a wheel rotate in 10 ms if its angular velocity is 8 rad/s.

    c) Sketch one cycle of the given function showing the values of each variable where the curve crosses the axis. V=50sin(4.2*10^2t)

    Could you show us what you attempted so far or what part is confusing you? The 1st two problems are just using the formulas in your book.
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  3. #3
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    Smile So far....

    I am studying by correspondence and there is basicall next to no information in the materials i have given that really explains this to me. Here's what i can gather

    1a) A=120
    T= 100*pi
    360
    F=?

    b) Is the formula Angle=Angular Velocity*time.......I'm not given a unit for time though

    c) i have no idea????

    Any help would be very much apprecviated
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  4. #4
    Super Member 11rdc11's Avatar
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    Quote Originally Posted by GAVREED2 View Post
    I am studying by correspondence and there is basicall next to no information in the materials i have given that really explains this to me. Here's what i can gather

    1a) A=120
    T= 100*pi
    360
    F=?

    b) Is the formula Angle=Angular Velocity*time.......I'm not given a unit for time though

    c) i have no idea????

    Any help would be very much apprecviated

    So you have the amp right but your peroid should be

    \frac{2\pi}{100\pi} = \frac{1}{50}

    the freq is the reciprocal of the period
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  5. #5
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    Thanks

    That makes more sense. Thanks heaps. Could you provide any insight into
    (b) or (c)? much appreicated
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