[" If "x=cos10^(@)cos20^(@)cos40^(@)," then the value of "x" is : "],[[" (a) "((1)/(8))tan10^(@)," (b) "((1)/(8))cosec10^(@)],[" s.T./P.G.T."]]

If x= cos 10^(@)cos 20^(@) cos 40^(@), 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

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

If cos(40^@ +x) =sin30^@ then the value of x is ___

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

If x= cos 10^(@)cos 20^(@) cos 40^(@), then the value of x is.............. A) 1/4 tan 10^(@) B) 1/8 cos 10^(@) C) 1/8 cosec 10^(@) D) 1/8 sec 10^(@)

cos20^@cos40^@cos80^@=