trig: 2sin^2x=2+cosx

2sin<sup>2</sup>x = 2 + cosx

2(1 - cos<sup>2</sup>x) = 2 + cosx

2 - 2cos<sup>2</sup>x = 2 + cosx

0 = 2cos<sup>2</sup>x + cosx

0 = cosx(2cosx + 1)

cosx = 0 ... x = pi/2, x = 3pi/2

2cosx + 1 = 0
cosx = -1/2 ... x = 2pi/3, x = 4pi/3

so ... tell me the benefits of home skoolin' again?
 
home schoolin

There is no benefit because if you get a teacher that dont know anything about the subject then you are pretty much screwed. My techer does not know anything about pre-calc/trig
 
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