" Prove that "tan20^(@)*tan40^(@)tan60^(...

" Prove that "tan20^(@)tan40^(@)tan60^(@)tan80^(@)=83

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Prove that: tan20^(@)tan40^(@)tan60^(@)tan80^(@)=3

Prove that :tan20^(@)tan40^(@)tan60^(@)tan80^(@)=3

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

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

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

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

Prove that: tan20^(@)tan30^(@)tan40^(@)tan80^(@)=1

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

Prove that: tan10^(@) tan20^(@)tan70^(@)tan80^(@)=1

Prove that: tan10^(@) tan20^(@)tan70^(@)tan80^(@)=1

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