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Solving Trigonometric Equations

Solve, finding all solutions in [0, 2) or [0, 360).

12cos2  + 8cos  + 1 = 0

A).  = 60 and 240; and  = 99.59 and 260.41
B).  = 60 and 300; and  = 99.59 and 260.41
C).  = 120 and 210; and  = 99.59 and 260.41
D).  = 120 and 240; and  = 99.59 and 260.41
E). None of the above.

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An equation is solved.

$2.19