ABCD is a cyclic quadrilateral whose diagonals intersect at a point E. If ∠DBC=70∘,∠BAC=30∘ and AB=BC, then find ∠ECD.

ABCD is a cyclic quadrilateral whose diagonals intersect at a point E.

1.	ABCD is a cyclic quadrilateral whose diagonals intersect at a point E. If ∠DBC=70∘,∠BAC=30∘ and AB=BC, then find ∠ECD.
Answer» ABCD is a cyclic quadrilateral whose diagonals intersect at a point E. If $∠ D B C = 70^{\circ}, ∠ B A C = 30^{\circ}$ and AB=BC, then find $∠ E C D .$