[" (1) "cos40^(@)+cos80+cos160,+cos240dot phi],[" (a) "0,(51" (c) "(1)/(2)quad " (d) "-(1)/(2)]

Similar Questions

Explore conceptually related problems

cos20^@cos40^@cos80^@=

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

cos 40^(@) + cos 80^(@) + cos 160^(@) =

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

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

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

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

Cos 40^(@) + Cos80^(@) + Cos160^(@) + Cos240^(@) =

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

Prove that cos40^(@) cos80^(@) cos160^(@) = -1/8