9.55 degrees.step-by-step explanation: the given angle is [tex]\frac{31\pi}{6}=5.166667\pi[/tex]1 cycle is equal to 2π radians. so 4π will be equal to two cycles.5.166667π-4π = 1.1...Read More
< coa = 150 ( given)as ba and bc are tangentsso oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre so in quadrilateral oabc <...Read More