Aparticle starts from rest at x=8 and proceeds with a simple harmonic motion so that after 2 seconds it reaches x=4 find an expression for the displacement an=t any time t

< 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'm pretty sure the answer is a. decreases with increase in