sin 12^(@) sin 24^(@) sin 48^(@) sin 84^...

`sin 12^(@) sin 24^(@) sin 48^(@) sin 84^(@)=`

A

`cos20^@cos40^@cos60^@cos80^@`

B

`sin20^@sin40^@sin60^@sin80^@`

C

`3/15`

D

`5/16`

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