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Unit Circle inequality.

  1. Jan 2, 2007 #1
    This was an exam question I had at the end of 2005 in my uni entrance exams.
    Can you do it?

    Establish the inequality

    [tex] xcosx < sinx < x [/tex] where [tex]0<x<pi/2[/tex] using the unit circle.

    is the tex working?
  2. jcsd
  3. Jan 2, 2007 #2
    Last edited by a moderator: Apr 22, 2017 at 2:56 PM
  4. Jan 2, 2007 #3
    That was quick!

    Yes, that's it. Cheers,
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