SOLUTION: Find all solutions of the equation 2cos^2theta + cos2theta=0

Question 437589: Find all solutions of the equation 2cos^2theta + cos2theta=0
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!

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==> , or
From the first equation, we get 240 degrees or 300 degrees.
From the 2nd equation we get 60 degrees or 120 degrees.
All solutions can described by the following:
or , where n varies over all the integers.
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