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Homework Help: Solve Trigonometric Equations

  1. Apr 23, 2006 #1
    Dear all,
    How to solve this trigonometric equation systematically?
    2cos^(2) x - cos x = 0, where x ∈ [0,360]

    Thanks in advance
  2. jcsd
  3. Apr 23, 2006 #2

    matt grime

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    Science Advisor
    Homework Helper

    You can find roots of f(y)=0 when f is any quadratic expression, and given that cos(t)=Z you can find all possible t, so just put those together.
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