Question

A B and C are three points on a triangle on centre with such that angle BAC is equal to 30 degree and triangle a b is equal to 60 degree if D is a point on the circle othe.r than the abc find ADC

Answer 1

Angle subtended by an arc at cntre is twice the angle subtended by it at any point on circle
so angle AOC=2ADC
so 90=2ADC
ADC=45