Results 1 to 3 of 3

Thread: Exact value for ratio

  1. #1
    Sep 2011

    Exact value for ratio

    Hey i need help finding the exact measures for these two trig ratios

    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member Quacky's Avatar
    Nov 2009
    Windsor, South-East England

    Re: Exact value for ratio

    Well, how would you solve \tan{\frac{4\pi}{3}}? Can you think of anything equivalent to this? Think of the unit circle - which other value for tan will give an equivalent result?

    For \cos{(\frac{-19\pi}{6})}, it's the same idea. Remember that \cos(x) is periodic every 2\pi radians, so you can keep adding \frac{12}{6}\pi to the value in the brackets and your answer will be unchanged.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member mathbyte's Avatar
    Oct 2011

    Post Re: Exact value for ratio

    I bet a diagram of the unit circle will help, too.
    See the one on Wikipedia here.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 5
    Last Post: Sep 21st 2011, 01:12 AM
  2. Ratio for curve and point-ratio form
    Posted in the Algebra Forum
    Replies: 4
    Last Post: Jan 11th 2010, 01:07 AM
  3. Why are exact ODEs called exact?
    Posted in the Differential Equations Forum
    Replies: 6
    Last Post: Dec 27th 2009, 10:48 AM
  4. Replies: 3
    Last Post: Nov 28th 2009, 07:06 PM
  5. Exact Value of trionometric ratio
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: Jul 28th 2009, 06:00 PM

Search Tags

/mathhelpforum @mathhelpforum