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Sin[θ+(pi/6)] Multiple values???

  1. May 24, 2016 #1
    Question:
    If cosθ=(3/5) and 0<θ<2pi
    determine the value of sin[θ+(pi/6)]

    Attempt:
    θ=cos^-1(3/5)

    θ=0.927295218

    sin[θ+(pi/6)]=0.992820323

    real answer = 0.992820323, -0.39282

    How do i find the second value, all i can find is 0.992820323 but not -0.39282
     
  2. jcsd
  3. May 24, 2016 #2

    DrClaude

    User Avatar

    Staff: Mentor

    This is not the only possibility.
     
  4. May 24, 2016 #3
    thank you i understand now
     
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