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!

Prove trig identities

  1. Mar 11, 2013 #1
    1. The problem statement, all variables and given/known data
    Prove the following:


    2. Relevant equations

    3. The attempt at a solution

    Took the right hand side:

    =2(sinA/cosA) / 1-(sin^2A/cos^2A)
    =2sinA/cosA /cos^2A-sin^2A/cos^2A
    =2sinA/cos2A /cosA/1

    Dont know what to do next?
  2. jcsd
  3. Mar 11, 2013 #2


    User Avatar
    Science Advisor
    Homework Helper

    What's an identity for sin(2A)? And I hope 2sinA/cos2A /cosA/1 means (2sin(A))/(cos(2A)/cos(A)) what you've written is not at all clear.
    Last edited: Mar 11, 2013
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Prove trig identities
  1. Proving trig identity~ (Replies: 6)

  2. Proving Trig Ident. (Replies: 5)

  3. Prove trig identity (Replies: 10)