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Solve Trigonometric Equations

  • Thread starter Spruance
  • Start date
33
0
Dear all,
How to solve this trigonometric equation systematically?
2cos^(2) x - cos x = 0, where x ∈ [0,360]

Thanks in advance
 

matt grime

Science Advisor
Homework Helper
9,394
3
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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