7" prove that "tan70^(@)=tan20^(@)+2tan50^(@)

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

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

Prove that tan 70^@=tan 20^@+2tan50^@

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.

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

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

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

Prove that tan 70^@= tan 20^@+2 tan 50^@ .

Prove that : tan 70^(@)+ tan 10^(@)- tan 50^(@)= sqrt(3)