27.500810^(@)cos20^(@)cos40^(@)" What is the value of ? "

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If x=cos10^(@)cos20^(@)cos40^(@), then the value of x is

If x= cos 10^(@)cos 20^(@) cos 40^(@), then the value of x is

If x=cos10^@cos20^@cos40^@ , then the value of x is

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

If x=cos 10^@ cos20^@ cos40^@ , then the value of x is

if ( cos ^(3) 20^@ + cos^(3) 40^(@))/( cos 20^@+ cos 40^(@)) = k ,then the value of k is

cos20^@cos40^@cos80^@=

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

If (cos^(3)20^(0)+cos^(3)40^(0))/(cos20^(0)+cos40^(0))=k , then the value of k is