Results 1 to 2 of 2

Math Help - Proving expression with sines.

  1. #1
    arm
    arm is offline
    Newbie
    Joined
    Feb 2011
    Posts
    14

    Proving expression with sines.

    Prove: sin^{2}(\alpha -\beta ) = sin^{2}\alpha - sin^{2}\beta +2sin\alpha .sin\beta .cos(\alpha- \beta )
    Last edited by mr fantastic; February 26th 2011 at 01:01 PM. Reason: Re-titled.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by arm View Post
    Prove: sin^{2}(\alpha -\beta ) = sin^{2}\alpha - sin^{2}\beta +2sin\alpha .sin\beta .cos(\alpha- \beta )
    To get help you need to show some effort. Show your work and say where you're stuck.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: December 15th 2010, 01:40 AM
  2. Proving the Law of Sines
    Posted in the Geometry Forum
    Replies: 4
    Last Post: February 11th 2010, 08:00 PM
  3. Replies: 4
    Last Post: May 15th 2009, 02:53 PM
  4. Help proving this expression is equal..
    Posted in the Calculus Forum
    Replies: 4
    Last Post: November 27th 2008, 03:33 AM
  5. simplify expression with sines
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: June 26th 2007, 01:00 PM

Search Tags


/mathhelpforum @mathhelpforum