alexandastanciu
alexandastanciu
07-11-2016
Mathematics
contestada
cos(2x) - 3cos(x) + 2= 0 ??
Respuesta :
tlcowin
tlcowin
07-11-2016
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
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