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!

Trigonometric Identities Section

  1. Feb 28, 2010 #1
    1. The problem statement, all variables and given/known data

    3sinx = 1 + cos 2x


    2. Relevant equations

    N/A

    3. The attempt at a solution

    3sinx = 1+1 - 2sin2x (Trigonometric Identity)
    3sinx = 2-2sin2x
    2sin2x + 3sinx = 2

    I do not know where to go from there.
    My book tells me the answer is 30o and 150o
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 28, 2010 #2
    What happens when you take 2 away from both sides?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Trigonometric Identities Section
  1. Trigonometric Identity (Replies: 8)

  2. Trigonometric Identity (Replies: 8)

  3. Trigonometric identity (Replies: 1)

  4. Trigonometric identity (Replies: 7)

  5. Trigonometric Identity (Replies: 1)

Loading...