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The equation 8 cos^(4) x/2 sin^(2)x/2= x...

The equation `8 cos^(4) x/2 sin^(2)x/2= x^(2) +1/x^(2), x int (0,4pi]` holds for

A

No value of `x`

B

Exactly two values of x, both greater than `pi`.

C

Exactly two values of x, one smaller than `pi` and the other greater than `pi`.

D

Just one value of x

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The correct Answer is:
C
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