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!

Homework Help: Can you solve this equation for x?

  1. Jan 28, 2012 #1
    2. Relevant equations

    x*cos(Ax) + B*sin(Ax) = 0

    Where A and B are nonzero constants.

    3. The attempt at a solution

    The only value of x where both terms are zero is x=0. All other solutions (presumably an infinite number of them) occur when:

    x*cos(Ax) = -B*sin(Ax), x≠0.

    This seems intractable to me, but I don't have the math skills required to recognize an equation that cannot be solved algebraically.
  2. jcsd
  3. Jan 28, 2012 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hi Michael! :smile:
    You can simplify it as tan(Ax)/x = -1/B …

    yes, that has no algebraic solution.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook