(tan20^(@)+tan40^(@)+tan60^(@)+....+tan180^(@))" is "

tan20^(@)tan40^(@)tan80^(@)

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

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

Find the value of: tan20^(@)+tan40^(@)+tan60^(@)+...+tan180^(@) (A) 0 (B) 1 (C) 2 (D) 3

tan20^(@)tan40^(@)tan60^(@)tan80^(@)=?

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

tan20^(@)tan40^(@)tan60^(@)tan80^(@)

tan20^(@)+tan40^(@)+tan60^(@)+.........+tan160^(@)+tan180^(@)=