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The equation x^3-3/(4)x=-(sqrt3)/8 is sa...

The equation `x^3-3/(4)x=-(sqrt3)/8` is satisfied by

A

`x = cos ((5pi)/(18))`

B

`x = cos ((7pi)/(18))`

C

`x = cos ((23pi)/(18))`

D

`x = - sin ((7pi)/(9))`

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The correct Answer is:
A, B, C, D
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