1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Simplification Through Fundemental Identities

  1. Feb 3, 2010 #1
    1. The problem statement, all variables and given/known data
    (sin3+cos3)/(sin+cos)


    2. Relevant equations
    sin2+cos2=1
    1 +cot2=csc2
    1+tan2=sec2
    Are these sufficient?

    3. The attempt at a solution
    Confusion. Epic confusion. I might have had it yesterday, but the mathematical equivalent of a writers anti-tank roadblock. At best.

    Ahhhhhhh, thanks...
     
    Last edited: Feb 3, 2010
  2. jcsd
  3. Feb 3, 2010 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    a^3+b^3=(a+b)*(b^2-ab+a^2). It's a general algebraic identity. Word to the wise.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook