In the adjoining figure AOB is a diameter,ARC DC =ARC BC,then prove that AD//OC

Answer 1

I don't know,plz help me,its important

Answer 2

i)♢PAQ=♢SBR
ii)□PQRB-♢PAB=PQRB-♢SBR
iii)□AQRB=□PQRS

Answer 3

i)BOC=BC
ii)DAB=1/2BD=BC
iii)BOC=DAB
iv)AD//OC