Asked by Dominic
Cos^2(x)+1/2Cos(x)=1/2
Answers
Answered by
oobleck
this is the same as
2cos^2x + cosx - 1 = 0
(2cosx-1)(cosx+1) = 0
x = π/3, π, 5π/3
2cos^2x + cosx - 1 = 0
(2cosx-1)(cosx+1) = 0
x = π/3, π, 5π/3
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