[" 8.(t) "tan20^(@)tan40^(@)tan.80^(@)=tan60^(@).],[" (ii) "tan20^(@)tan40^(@)tan.80^(@)=tan60^(@).]

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

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

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

tan20^(@)tan30^(@)tan40^(@)tan80^(@)=1

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

Prove that tan20^(@)tan40^(@)tan80^(@)=tan60^(@)

Prove that tan20^(@)tan40^(@)tan80^(@)=tan60^(@) .

Prove that: tan20^(@)tan40^(@)tan80^(@)=tan60^(@)

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^@=