Results 1 to 5 of 5
Like Tree1Thanks
  • 1 Post By Prove It

Math Help - find the derivative of this function

  1. #1
    Junior Member
    Joined
    Jul 2012
    From
    auckland
    Posts
    46

    find the derivative of this function

    how do i do this

    find the derivative of this funtion.
    y= ln (ln(tanx))



    derive the following properties of log x:
    a

    how do i do this ?

    log U/v = log u-log v
    a a a

    (the a's are the littlle number/letter at the bottom of log)
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,591
    Thanks
    1445

    Re: find the derivative of this function

    Quote Originally Posted by arsenal12345 View Post
    how do i do this

    find the derivative of this funtion.
    y= ln (ln(tanx))



    derive the following properties of log x:
    a

    how do i do this ?

    log U/v = log u-log v
    a a a

    (the a's are the littlle number/letter at the bottom of log)
    You should use the chain rule. In this case, since you have a composition of another composition, you'll need to use the chain rule twice. So

    \displaystyle \begin{align*} \frac{dy}{dx} = \frac{dy}{du} \, \frac{du}{dv} \, \frac{dv}{dx} \end{align*}

    where \displaystyle \begin{align*} v = \tan{x} , u = \ln{v} \end{align*} and \displaystyle \begin{align*} y = \ln{u} \end{align*}.
    Thanks from arsenal12345
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Jul 2012
    From
    auckland
    Posts
    46

    Re: find the derivative of this function

    Quote Originally Posted by Prove It View Post
    You should use the chain rule. In this case, since you have a composition of another composition, you'll need to use the chain rule twice. So

    \displaystyle \begin{align*} \frac{dy}{dx} = \frac{dy}{du} \, \frac{du}{dv} \, \frac{dv}{dx} \end{align*}

    where \displaystyle \begin{align*} v = \tan{x} , u = \ln{v} \end{align*} and \displaystyle \begin{align*} y = \ln{u} \end{align*}.
    what about the question below that ?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,591
    Thanks
    1445

    Re: find the derivative of this function

    Quote Originally Posted by arsenal12345 View Post
    what about the question below that ?
    You're welcome ><
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Jul 2012
    From
    auckland
    Posts
    46

    Re: find the derivative of this function

    Quote Originally Posted by Prove It View Post
    You're welcome ><
    sorry please accept my apologies for my lack of manners
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: March 6th 2011, 04:57 AM
  2. How to find the derivative of this function
    Posted in the Calculus Forum
    Replies: 14
    Last Post: September 11th 2010, 03:46 AM
  3. Find the derivative of the function..
    Posted in the Calculus Forum
    Replies: 5
    Last Post: December 16th 2009, 04:35 PM
  4. How to find the derivative of a function
    Posted in the Calculus Forum
    Replies: 2
    Last Post: September 27th 2009, 11:06 AM
  5. Find derivative of function?
    Posted in the Calculus Forum
    Replies: 1
    Last Post: November 13th 2008, 06:40 AM

Search Tags


/mathhelpforum @mathhelpforum