Thursday

August 21, 2014

August 21, 2014

Posted by **Mac** on Monday, March 2, 2009 at 6:24pm.

- Math -
**Reiny**, Monday, March 2, 2009 at 6:36pmI will assume your domain is 0 --- 360

2sin^2x+cosx-2=0

2(1- cos^2x) + cosx - 2 = 0

2 - 2cos^2x + cosx - 2 = 0

2cos^2x - cosx = 0

cosx(2cosx - 1) = 0

cosx = 0 or cosx = 1/2

x = 90º or 270º or x = 60º or x = 300º

these can be easily converted to radians

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