Results 1 to 4 of 4

Math Help - Graph of two sinusoids

  1. #1
    Member wiseguy's Avatar
    Joined
    Jul 2010
    Posts
    101

    Help please...Graph of two sinusoids

    [Graph]
    y=3cos120pix+cos800pix

    Period of the longer sinusoid: 0.05
    Period of the shorter sinusoid: 0.016666
    Frequency of the longer sinusoid: 20 cycles
    Frequency of the shorter sinusoid: 60 cycles

    I'm taking a bit of a shot in the dark on this one... does it look correct?
    Last edited by wiseguy; July 23rd 2010 at 09:22 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member wiseguy's Avatar
    Joined
    Jul 2010
    Posts
    101
    (deleted, merged into other post)
    Last edited by wiseguy; July 23rd 2010 at 09:21 PM. Reason: deleted
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28
    Quote Originally Posted by wiseguy View Post
    [Graph]

    Period of the longer sinusoid: 0.05
    Period of the shorter sinusoid: 0.016666

    These answers worry me, which of the two summed functions do you think is longer?

    Period for \cos nx can be found by \frac{2\pi}{n}

    Quote Originally Posted by wiseguy View Post
    [Graph]





    Period of the shorter sinusoid: 0.016666
    I think you mean = \frac{1}{60}= 0.01\dot{6}
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Member wiseguy's Avatar
    Joined
    Jul 2010
    Posts
    101
    So would the two periods be 0.016 and 0.0025? Or are the correct???
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Generation of Sinusoids
    Posted in the Math Software Forum
    Replies: 1
    Last Post: December 18th 2011, 08:45 PM
  2. Conjecturing sinusoids using a CAS?
    Posted in the Pre-Calculus Forum
    Replies: 5
    Last Post: August 20th 2010, 12:38 AM
  3. [SOLVED] Product of two sinusoids
    Posted in the Trigonometry Forum
    Replies: 9
    Last Post: July 26th 2010, 11:43 AM
  4. Sinusoids
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: April 26th 2010, 03:24 PM
  5. Pre Cal probs dealing with sinusoids
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: May 3rd 2009, 03:07 PM

/mathhelpforum @mathhelpforum