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" 5.Show that "tan70^(@)=2tan50^(@)+tan2...

" 5.Show that "tan70^(@)=2tan50^(@)+tan20^(@).

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

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

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

Show that : tan 70^(@)=2 tan 40^(@)+ tan 20^(@)+ 4 tan 10^(@)

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

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

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

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

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