Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Help with integrating these simple functions

  1. Sep 30, 2004 #1
    how do i integrate sqrt(3-(x^2))/sqrt(3)? i put the sqrt(3) outside the integral and tried using the substitution method to integrate it but there is still an x in there?

    same thing with integrating sqrt(3-3*(x^2))

    Thanks!!! This thing is due tomorrow.. :eek:
  2. jcsd
  3. Sep 30, 2004 #2
    that's a classic trig substitution case. (Use sine trig substitution).
  4. Sep 30, 2004 #3
    both of them?
  5. Sep 30, 2004 #4
    Yeah it's not that much different with both.. just different coefficients you have to pull out of the square root.
  6. Sep 30, 2004 #5
    alright i think i almost got it.. now i have another question, whats the integral of cos^2(x)?
    Last edited: Oct 1, 2004
  7. Oct 1, 2004 #6


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    You've got the identity:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook