if the equation 2sin²A-cosA +4
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2 ( 1 - cos²A ) - cos A + 4
2 - 2cos²A - cos A + 4
-2 cos²A - cos A + 6
- ( 2 cos² A + cos A - 6 )
- ( 2 cos² A + 4 cos A - 3 cos A - 6 )
( cos A + 2 ) ( 3 - cos A )
2 - 2cos²A - cos A + 4
-2 cos²A - cos A + 6
- ( 2 cos² A + cos A - 6 )
- ( 2 cos² A + 4 cos A - 3 cos A - 6 )
( cos A + 2 ) ( 3 - cos A )
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