I’m gonna die no one has answered my question I asked for 3 hours and no reply plz help now

dont do that because i tried to do that an my whole fam was worried about me.. then my sisted did it and she succeeded and she was like a bestfriend to me... so please dont do that

Step-by-step explanation:

< 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⭐