The value of cos 20^(@) cos 40^(@)cos 60...

The value of `cos 20^(@) cos 40^(@)cos 60^(@) cos 80^(@)` is equal to

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

cos20^(@)cos40^(@)cos60^(@)cos80^(@)=

The value of cos40^(@)+cos80^(@)+cos160^(@) is

cos20^(@).cos40^(@).cos60^(@).cos80^(@) is :

cos20^(@).cos40^(@).cos60^(@).cos80^(@)=1/16

cos20^(@).cos40^(@).cos60^(@).cos80^(@)=1/16

Find the value of cos 20^@ cos 40^@ cos 80^@

cos40^(@)+cos 80^(@)+cos160^(@)+cos240^(@) =

cos20^(0)cos40^(0)cos60^(0)cos80^(0) is equal to

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