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Let S = { theta in [-2pi,2pi]:2 cos^(2)...

Let `S = { theta in [-2pi,2pi]:2 cos^(2) theta + 3 sin theta = 0}`, then the sum of the equations elements of S is .

A

`(-4pi)`

B

`3pi`

C

`pi`

D

`(pi)/(3)`

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A
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