1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Simplifying an expression

  1. Mar 11, 2004 #1
    can someone explain to me the stages that are missing in the expression in the attached picture. i think that it has to do with identities but in the book that i got it from did not explain clearly how they went from one line to another. i will appreciate the help very much.
     

    Attached Files:

  2. jcsd
  3. Mar 11, 2004 #2
    It uses this identity:

    [tex]sin(x)cos(y) = \frac{1}{2}\left(sin(x+y) + sin(x-y)\right)[/tex]

    [tex] x = \theta[/tex]
    [tex] y = \theta - 30^o[/tex]
     
  4. Mar 11, 2004 #3
    thanx very much gnome i thought that i would never get a response
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Simplifying an expression
  1. Simplify a expression (Replies: 8)

Loading...