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!

Integral of cotx squared

  1. Sep 30, 2009 #1
    1. The problem statement, all variables and given/known data
    find the integral of (cscx)2 between pie/6 to pie/2




    3. The attempt at a solution

    cot2x = 1 / sin2x * cos2x / cos2x
    which becomes..
    tan2x * sec2x
    then i substituted u for tan x, and turned the integral into..
    u2du = u3 / 3
    which is..
    tan3x / 3 between pie/6 and pie/2.

    However, tan is undefined at pie/6!! what do i do?
     
  2. jcsd
  3. Sep 30, 2009 #2
    No, that last line should be cot2x * sec2x, and the cot in the first line should be csc.

    That's not true; it is defined at [itex]\pi[/itex]/6. What is sin[itex]\pi[/itex]/6 and cos[itex]\pi[/itex]/6? Put sine over cosine.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Integral of cotx squared
  1. Square of an integral (Replies: 5)

  2. Squaring an Integral ? (Replies: 5)

Loading...