(ii) tan20° tan40° tan60° tan80º = 3

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

Prove the following : tan 20^@ tan 40^@ tan 60^@ tan 80^@=3 .

Prove that : tan 20^0 tan 40^0 tan 60^0 tan 80^0 =3

Prove that tan20^0tan40^0tan60^0tan80^0 =3

Prove that: t a n 20^0tan40^0tan60^0tan80^0=3

Prove tan 20^0 tan 30^0 tan 40^0 tan 80^0=1

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

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