If a+ib11 = p + iq, where i = √−1.Find the value of (b+ia)11.
The sides BC, CA and AB of ΔABC are produced in order to form exterior angles ∠ACD , ∠EAB, and ∠CBF. If x+y+z=180∘ then ∠ACD+∠CBF+∠EAB is