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" 6.i) Prove that "Tan70^(@)-tan20^(@)=2...

" 6.i) Prove that "Tan70^(@)-tan20^(@)=2" Tan "50^(@)

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Prove that tan70^(@)-tan20^(@)=2tan50^(@) .

tan 70^(@) - tan 20^(@)=

Prove that tan 70 - tan 20 ^(@)=2 tan 50^(@)

Prove that : tan 70^(@) = tan 20^(@) + 2 tan 50^(@)

Prove that: tan70^(@)=tan20^(@)+2tan50^(@)

tan 70^(@) - tan 20^(@) -2 tan 40^(@)=

tan 70^(@) - tan 20^(@) -2 tan 40^(@)=

Prove that, tan 70^(@) = 2tan 50^(@) + tan 20^(@)

Tan20^(@) + 2Tan50^(@) =