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: Verify trigonometric identity

  1. Nov 3, 2008 #1
    1. The problem statement, all variables and given/known data
    tanX+tan Y / 1-tanXtanY= cotX+cotY/cotXcotY-1


    2. Relevant equations

    tan= sin/cos
    cot= cos/sin

    3. The attempt at a solution
     
  2. jcsd
  3. Nov 4, 2008 #2
    Attempt at a solution?

    Try substituting those equations into your problem. Where does that get you?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook