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The value of sin 20^(circ) sin 40^(circ)...

The value of `sin 20^(circ) sin 40^(circ) sin 60^(circ) sin 80^(circ)` is

A

`-(3)/(16)`

B

`(5)/(16)`

C

`(3)/(16)`

D

`(1)/(16)`

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