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Last minute Maths

  • 08-06-2012 10:27am
    #1
    GarIT
    Registered Users, Registered Users 2 Posts: 8,671 ✭✭✭


    Is cos(2/x) diffentiated 2x^-2sin2x^-1?


    Also what is pi differentiated?


Comments

  • #2
    TheBody
    Registered Users, Registered Users 2 Posts: 5,633 ✭✭✭TheBody


    GarIT wrote: »
    Is cos(2/x) diffentiated 2x^-2sin2x^-1?


    Also what is pi differentiated?

    Yes, [Latex]\frac{d}{dx}\cos(\frac{2}{x})=\frac{d}{dx}\cos(2x^{-1})=2x^{-2}\sin(2x^{-1})[/Latex]

    To answer your second question:

    [Latex]\frac{d}{dx}\pi=0[/Latex].

    Remember [Latex]\pi[/Latex] is just a constanst so the derivative is just 0.


  • #3
    Wanchor
    Registered Users, Registered Users 2 Posts: 114 ✭✭Wanchor


    Yes, the cos one seems to be correct.

    PI is a constant! Treat it like 1 or 2.

    Edit: I didn't know this forum had LaTex :o


  • #4
    TheBody
    Registered Users, Registered Users 2 Posts: 5,633 ✭✭✭TheBody


    Wanchor wrote: »
    Yes, the cos one seems to be correct.

    PI is a constant! Treat it like 1 or 2.

    Edit: I didn't know this forum had LaTex :o


    There is a whole forum on it here:

    http://www.boards.ie/vbulletin/forumdisplay.php?f=1286


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