1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Taylor polynomials

  1. Nov 1, 2012 #1
    1. The problem statement, all variables and given/known data

    Find the degree 3 Taylor polynomial approximation to the function f(x)=5ln(sec(x)) about x=0.

    2. Relevant equations

    the taylor polynomial equation

    3. The attempt at a solution

    Here are my derivatives

    Please let me know if any of the above are wrong

    When I try to plug in 0 for the x's above I end up with a whole lot of undefined answers because sec0=undefined. How can I get around this?

  2. jcsd
  3. Nov 1, 2012 #2
    Are you sure that [itex]sec 0 = \frac{1}{cos 0}[/itex] is undefined?
  4. Nov 1, 2012 #3
    oops, got sec and csc confused. Thanks
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook