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May 6, 2015

Homework Help: pre-cal

Posted by james on Friday, January 1, 2010 at 2:54pm.

What are the steps for solving this?

Directions Use the quadratic formula to solve the equation in the interval [0,2PI). Then use a graphing utility to approximate the angle x.

4cos^2x-4cosx-1=0

thanks.

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