Which equation represents circle A? O (X - 4)2 + (y + 5)2 = 12
0 (x + 4)2 + (y – 5)2 = 12
(x - 4)2 + (y + 5)2 = 36
(x + 4)2 + (-5)2 = 36

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

answer: the answer is e

step-by-step explanation: