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If -pi < theta < pi, the equation (cos...

If `-pi < theta < pi`, the equation
`(cos 3 theta + 1)x^(2) + 2(cos 2theta - 1)x` `+(1 - 2 cos theta) = 0`
has more than two roots for

A

no value of `theta`

B

one value of `theta`

C

two value of `theta`

D

all value of `theta`

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A
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