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tan20+tan40+tan80-tan60...

tan20+tan40+tan80-tan60

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If tan20^0+tan40^0+tan80^0-tan60^0 = lambdasin40^0 , find lambda.

tan20 + tan40 + tan60 + ......... + tan180

65. The value of tan 20 tan 40 tan 80 is

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

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

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

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

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

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