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For which values of a does the equation `4sin(x+pi/3)cos(x-pi/6)=a^2+sqrt(3)sin2x-cos2x` have solution? Find the solution for `a-0,a n ye xi s t sdot`

A

`-2`

B

0

C

2

D

`a,ain]-2,2[`

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A, B, C, D
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