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[" 107.The value of "],[[(tan20^(@)+tan4...

[" 107.The value of "],[[(tan20^(@)+tan40^(@)+tan60^(@)+....+tan180^(@))" is "],[(a)9,(b)4(1)/(2),(c)0,(d)1]]

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

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

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

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

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

tan20^(@)+tan40^(@)+sqrt(3)tan20^(@).tan40^(@)=?

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

tan20^@tan40^@tan60^@tan80^@=

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