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!

Difference between arctan(x) and cot(x)

  1. Jul 20, 2009 #1
    If arctan(x) = tan(x)^-1 and since tan(x) = sin(x)/cos(x) is not arctan(x) = cot(x). I know something's not right here but what is it?

  2. jcsd
  3. Jul 20, 2009 #2


    User Avatar
    Homework Helper

    No no.

    arctan(x)=tan-1(x) [itex]\neq[/itex]1/tan(x)
  4. Jul 21, 2009 #3
    Just to clarify, that notation doesn't mean the multiplicative inverse in this context, but the inverse function.

    With whatever restrictions are necessary so that those are functions and not just relations.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Difference between arctan(x) and cot(x)
  1. Sin(arctan(x/4))= ? (Replies: 4)