SOLUTION: Find all solutions of the equation in the interval [0,2pi) 2cos^2x-cosx=1

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Question 993471: Find all solutions of the equation in the interval [0,2pi)
2cos^2x-cosx=1
Answer by solver91311(24713) About Me  (Show Source):
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Let

Then



Solve the quadratic and the substitute back. Find all values of that have cosine function values of the roots of the equation.

John

My calculator said it, I believe it, that settles it