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" iy "tan70^(@)=2tan50^(@)+tan20^(@)...

" iy "tan70^(@)=2tan50^(@)+tan20^(@)

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

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

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

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

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

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

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

The value of tan20^(@)+2 tan50^(@)-tan70^(@), is

The value of tan20^(@)+2 tan50^(@)-tan70^(@), is

The value of tan20^(@)+2 tan50^(@)-tan70^(@), is ................. A) 1 B) 0 C) tan 50^(@) D) tan 70^(@)