Answer: The earth is keeping up with the planet as they orbit the sun, so we don't get the angle to see a crescent
<span>Finite angular displacements are not vector quantities, the reason being that they do not obey the law of vector addition. This law asserts that the order in which vectors are added does not affect their sum.
However finite angles under addition tend towards commutivity as the angles become very small. Infinitesimal angles do commute under addition, making it possible to treat them as vectors.</span>
As we know the relation between linear speed and angular speed as
we will say
so here we can say that angular speed will be given as
so it is rotating at angular speed 160 rad/s