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

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) (Show Source): You can put this solution on YOUR website!

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

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