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

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

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

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

Prove that tan 70^(@)-tan 20^(@)-2 tan 40^(@)=4 tan 10^(@)

Prove that tan70^(@)-tan20^(@)-2tan40^(@)=4tan10^(@) . (b) In a DeltaABC , if a=2sqrt3,b=2sqrt2andC=75^(@) find the other side and the angles.

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

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

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

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

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