Question

In the given figure, O is the centre of the circle, ∠BAO = 68°, AC is the diameter of the circle, then find
∠BCO.

Answer 1

as ac is diamter, angle susbstended by two chords touching diameters end they substend 90 degree . so by asp 90 +68 +bco= 180 . hence bco equals 22 degree