Results 1 to 2 of 2

Thread: derivative of trig function

  1. April 11th 2009, 08:43 AM #1
    saiyanmx89
    saiyanmx89 is offline
    Member
    Joined
    Jan 2009
    Posts
    100

    derivative of trig function

    f(x) = (x^2)cosx
    f'(x) = 2xcosx - (x^2)sinx
    f''(x) = 2cosx - 4xsinx - (x^2)cosx

    Did I do the second derivative right?
    Follow Math Help Forum on Facebook and Google+
  2. April 11th 2009, 08:48 AM #2
    Jhevon
    Jhevon is offline
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by saiyanmx89 View Post
    f(x) = (x^2)cosx
    f'(x) = 2xcosx - (x^2)sinx
    f''(x) = 2cosx - 4xsinx - (x^2)cosx

    Did I do the second derivative right?
    yup
    Follow Math Help Forum on Facebook and Google+
« Related rates and implicit | Partial Derivatives-Chain Rule »

Similar Math Help Forum Discussions

  1. derivative of trig function
    Posted in the Calculus Forum
    Replies: 4
    Last Post: February 10th 2011, 12:18 PM
  2. Derivative of this trig function
    Posted in the Calculus Forum
    Replies: 7
    Last Post: December 12th 2010, 01:55 PM
  3. Derivative of a trig function
    Posted in the Calculus Forum
    Replies: 2
    Last Post: July 20th 2010, 11:24 AM
  4. Derivative of a Trig Function
    Posted in the Calculus Forum
    Replies: 3
    Last Post: March 22nd 2009, 04:27 PM
  5. derivative of trig function
    Posted in the Calculus Forum
    Replies: 3
    Last Post: October 4th 2008, 08:07 PM

Search Tags


/mathhelpforum @mathhelpforum