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!

Trig Identity

  1. Oct 12, 2005 #1
    Prove the identity:

    sinA / (1+cosA) = tan (A/2).

    Im going no where with this, please help?:confused: :confused:
  2. jcsd
  3. Oct 12, 2005 #2


    User Avatar
    Homework Helper

    use the double angle formula for cos2ø.
  4. Oct 12, 2005 #3
    Sorry I dont understand. And I am trying to apply the double angle formulae but I am just getting confused.
  5. Oct 12, 2005 #4
    Problem solved...No need to reply
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Trig Identity
  1. Trig Identities (Replies: 8)

  2. Trig Identities (Replies: 18)

  3. Trig Identity (Replies: 1)

  4. Trig Identities (Replies: 6)

  5. Trig Identities (Replies: 8)