Results 1 to 2 of 2

Math Help - Trig Exact Values

  1. #1
    Newbie
    Joined
    Nov 2008
    Posts
    3

    Trig Exact Values

    How would you find the exact values for sin(67.5)?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,551
    Thanks
    12
    Awards
    1
    Quote Originally Posted by PDBear View Post
    How would you find the exact values for sin(67.5)?
    Use half-angle identity \sin \frac{x}{2}=\pm \sqrt{\frac{1 - \cos x}{2}}

    Now find \sin\left(\frac{135}{2}\right)
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. trig exact values
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: September 23rd 2011, 11:50 PM
  2. Exact values using trig identities
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: April 29th 2009, 04:27 PM
  3. trig functions and exact values
    Posted in the Trigonometry Forum
    Replies: 11
    Last Post: July 2nd 2008, 04:58 AM
  4. Trig exact values
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: April 23rd 2008, 01:40 AM
  5. Trig identities, exact values
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: November 6th 2007, 03:50 AM

Search Tags


/mathhelpforum @mathhelpforum