1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Maximum and chnage of sign of a function

  1. May 27, 2009 #1
    Guys Can anyone help me in this? I need a function (cos or sin) maximum at 7Pi/4 and at the same time changes sign under phi->phi+Pi with 0< phi< 2Pi....Thank you
     
  2. jcsd
  3. May 27, 2009 #2
    Do you know how to shift and stretch functions?
     
  4. May 28, 2009 #3
    Yes of course I do and u can find a function that is maximum at 7pi/4 but the problem is how to also make it change sign under phi->phi+Pi...
     
  5. May 28, 2009 #4

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    [tex]sin(x+ \pi)= -sin(x)[/tex]

    That's no problem at all!
     
  6. May 28, 2009 #5
    Thanks HallsofIvy but the maximum of the function should be at [tex] \phi=\frac{7\pi}{4}[/tex]. I guess the function should be [tex] \sin (\phi-\frac{\pi}{4}) [/tex]
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Maximum and chnage of sign of a function
Loading...