" P.T taneo tany "6" br "80" " = tan "60

Prove the following : tan 20^@ tan 40^@ tan 80^@= tan 60^@ .

tan 20^(@) tan 40^(@) tan 80^(@) = tan 60^(@)

If x + y + z = pi , tanx tany = 2 tanx + tany + tanz = 6 , then z equals :

Prove that tan 20^(@) tan 40^(@) tan 80^(@)=tan 60^(@)

Prove the following: (i) "tan" 20^(@) tan 40^(@) tan 60^(@) tan 80^(@)=3 (ii) "tan" 20^(@) tan 40^(@) tan 80^(@)="tan" 60^(@) .

Prove that tan 20^@tan 40^@ tan 60^@ tan 80^@ = 3

tan10^(@) tan 20^(@) tan 30^(@) tan 40^(@) tan 50^(@) tan 60^(@) tan 70^(@) tan 80^(@)=