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Cos(2x) - 3cos(x) + 2= 0 ??
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Cos(2x) - 3cos(x) + 2= 0 ??

User Zach Bublil
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7.9k points

1 Answer

2 votes
ignore above
your equation is 2(cosx)^2-3cosx+1=0
use quadratic formula to get results
you will end up with
cosx=1 or cosx=1/2
so, x=0 or x=pi/3
Cos(2x) - 3cos(x) + 2= 0 ??-example-1
User HTBR
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