Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Critical Points

  1. Feb 2, 2013 #1
    for cos y the critical points are n*pi - 0.5*pi
    for cos 2x, the critical points should be n/2 * pi - 0.25*pi
    because if I set y=2x = n*pi - 0.5*pi , I get the eq in red for x.
    However if I do it graphically, I just get n*pi - 0.25*pi.
    The question: why algebraically I am constrained to use the even number n but graphically, there is no restriction on n?
     
  2. jcsd
  3. Feb 2, 2013 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    I think your critical points for cos y are wrong. Do you mean sin?

    Answer: At least one of them is wrong.
     
  4. Feb 2, 2013 #3

    pwsnafu

    User Avatar
    Science Advisor

    I think you have critical point and root mixed up.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Critical Points
  1. Critical point (Replies: 7)

  2. Critical point (Replies: 2)

  3. Critical points (Replies: 6)

  4. Critical points (Replies: 4)

  5. Critical points (Replies: 2)

Loading...