Results 1 to 2 of 2

Math Help - composite trig function simplification

  1. #1
    Junior Member
    Joined
    May 2008
    Posts
    26

    composite trig function simplification

    I need to simplify cos(arctan(x)). I did trig a few years ago and can't remember basic stuff like this.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,923
    Thanks
    1762
    Awards
    1
    Quote Originally Posted by eniuqvw View Post
    I need to simplify cos(arctan(x)).
    \phi  = \arctan (x)\, \Rightarrow \,\tan (\phi ) = x = \frac{x}<br />
{1}\, \Rightarrow \,\cos (\phi ) = \frac{1}<br />
{{\sqrt {1 + x^2 } }}
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Trig Simplification
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: March 28th 2011, 09:20 PM
  2. In Trig Simplification..
    Posted in the Trigonometry Forum
    Replies: 4
    Last Post: November 28th 2010, 10:28 PM
  3. help with composite function for trig
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: November 29th 2009, 03:54 PM
  4. Trig Simplification
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: October 20th 2009, 06:03 PM
  5. Trig Function Simplification
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: November 21st 2008, 03:12 PM

Search Tags


/mathhelpforum @mathhelpforum