- #1
i-love-physics
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Homework Statement
Solve for X
Homework Equations
2sin^2x - cosX - 1 = 0
The Attempt at a Solution
I have gone in this order
I turned 2sin^2x into 1 - cos2x
so
1 - cos2x - cosx -1 = 0
This turns into
Cos2x + cosx = 0
I don't know what to do next...
could someone please help :(, much appreciated