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" that ")tan40^(@)+2tan16^(@)=tan50^(@)...

" that ")tan40^(@)+2tan16^(@)=tan50^(@)

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Prove that tan40^(@) + 2tan10^(@) = tan50^(@)

Prove that tan40^(@) + 2tan10^(@) = tan50^(@)

tan50^(@)-2tan10^(@)=

tan20^(@)+2tan50^(@)=

Prove that tan 50^(@) -tan40^(@)-2tan10^(@) .

Prove that tan 40^(@) + 2 tan 10^(@) = tan 50^(@)

Prove that: tan10^(@)tan50^(@)+tan50^(@)tan70^(@)+tan70^(@)tan170^(@)=3

tan10^(@)-tan50^(@)+tan70^(@)

tan10^(@)-tan50^(@)+tan70^(@)=?

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