[" What is the value of "],[8cos10^(@)cos20^(@)cos40^(@)?]

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Find the value of 8 cos10^(@)cos20^(@)cos40^(@) .

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

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If x=cos10^(@)cos20^(@)cos40^(@) , then x = ?

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