You move down 4 units and up 3 units. you end at (-5,3). Where did you start?

(-5,4)

Step-by-step explanation:

To reverse our steps we need to go up 4 units and down 3 units

+4 -3 = +1

This is in the y direction

(-5,3+1)

(-5,4)

< 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⭐

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation: