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Homework Help: 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


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    Homework Helper

    use the double angle formula for cos2ΓΈ.
  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
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