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tan 20^@ tan 40^@ tan 80^@...

`tan 20^@ tan 40^@ tan 80^@`

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

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

Prove that tan20^(@) tan40^(@) tan80^(@) = sqrt3

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

Evaluate without using trigonometric tables : tan 20^(@) tan 40^(@) tan 50^(@) tan 70^(@)

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

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

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