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The number of distinct real roots of |s ...

The number of distinct real roots of `|s in x cos x cos x cos x s in x cos x cos x cos x s in x|=0` in the interval `-pi/4lt=xlt=pi/4` is `0` b. `2` c. `1` d. `3`

A

0

B

2

C

1

D

3

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The correct Answer is:
C
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