Results 1 to 2 of 2

Thread: I need help justifying a quotient of two trig functions

  1. #1
    Nh0
    Nh0 is offline
    Newbie
    Joined
    Feb 2019
    From
    Home
    Posts
    1

    Unhappy I need help justifying a quotient of two trig functions

    I know (1-cos2(x/2))1/2/(1-cosx)1/2 Is equal to 1/root2 but I don't know a formal method for justifying this, so I'm asking for someone to show me how to show my teacher that it's a true identity
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Oct 2009
    From
    Brisbane
    Posts
    1,216
    Thanks
    444

    Re: I need help justifying a quotient of two trig functions

    Quote Originally Posted by Nh0 View Post
    I know (1-cos2(x/2))1/2/(1-cosx)1/2 Is equal to 1/root2 but I don't know a formal method for justifying this, so I'm asking for someone to show me how to show my teacher that it's a true identity
    Work with the numerator first. Can you use one of the trig identities to simplify it into one term?

    Now work with the denominator. Can you use a (different) trig identity to simplify it into one term?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Justifying the closure of a set
    Posted in the Differential Geometry Forum
    Replies: 3
    Last Post: Sep 23rd 2010, 04:28 AM
  2. quotient of functions
    Posted in the Algebra Forum
    Replies: 7
    Last Post: Dec 11th 2009, 08:15 PM
  3. Replies: 2
    Last Post: Sep 24th 2009, 09:43 PM
  4. Value of a trig quotient
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: Aug 19th 2009, 09:55 PM
  5. quotient of 2 functions??
    Posted in the Algebra Forum
    Replies: 7
    Last Post: Sep 3rd 2007, 07:05 PM

Search Tags


/mathhelpforum @mathhelpforum