1. Not finding help here? Sign up for a free 30min 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!

Solving for x involving trig

  1. Nov 13, 2009 #1
    I have formula z(x)=2ASin(7*pi*x)Cos(3*pi*x)
    I need to find the location where the displacement is max and min.

    I understand how to get the differential z'(x)=A4piCos(4*pi*x)+A10piCos(10*pi*x)
    Then I need to find critical points... this is where I have been having the trouble. My calculator keeps telling me my dimensions don't work, and it is really killing me. How do you solve for that = 0?

    Edit: z(x) can also be written as A(Sin(4*pi*x)+Sin(10*pi*x)) if that saves you any work
    Also: x is between 0 and 1meter

    -----------Problem Solved----------
     
    Last edited: Nov 13, 2009
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?



Similar Discussions: Solving for x involving trig
Loading...