Results 1 to 2 of 2

Math Help - Verifying derivatives?

  1. #1
    Newbie
    Joined
    Oct 2010
    Posts
    11

    Verifying derivatives?

    Can someone please help me.. I'm having no luck with help at all I really appreciated if someone would kindly help me with this.

    The inverse secant function is often defined for |x| ≥ 1
    by y=sec^{ - 1}x <=> sec y = x , 0 ≤ y ≤ π , y ≠ π/2

    Verify that the derivative is correct for x > 1
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    15,373
    Thanks
    1314
    Verify that what derivative is correct? You haven't given us anything to verify.

    If y= f^{-1}(x) then x= f(y) so that \frac{df^{-1}(x)}{dx}= \frac{dy}{dx}= \frac{1}{\frac{dx}{dy}}= \frac{1}{\frac{df}{dy}}

    Take the reciprocal of whatever formula you are given for the derivative of inverse secant and see if it looks like the derivative of secant.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Verifying help
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: October 19th 2011, 10:52 AM
  2. Help verifying this ID?
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: March 23rd 2011, 09:21 AM
  3. Verifying
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: February 28th 2009, 11:28 AM
  4. Replies: 4
    Last Post: February 10th 2009, 09:54 PM
  5. Verifying!!
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: November 2nd 2008, 06:55 PM

Search Tags


/mathhelpforum @mathhelpforum