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cos 20^(@) cos 40^(@) cos 80^(@)=..........

`cos 20^(@) cos 40^(@) cos 80^(@)=`............ A) `1/2` B) `1/4` C) `1/6` D) `1/8`

A

`1/2`

B

`1/4`

C

`1/6`

D

`1/8`

Text Solution

Verified by Experts

The correct Answer is:
D
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