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Let theta be a an acute angle such th...

Let `theta` be a an acute angle such that the equation `x^(3) + 4x^(2) cos theta + x cot theta = 0 ` has multiple roots. Then the value of `theta ` (in radians ) is

A

`(pi)/(3)`

B

`(pi)/(8)`

C

`(pi)/(12) or (5pi)/(12)`

D

`(pi)/(6) or (5pi)/(12)`

Text Solution

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The correct Answer is:
C
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