Answer:
Step-by-step explanation:
Given term: 
<em>In algebra, like terms are the terms which have the same variables with same powers. </em>
Here the variables are a and d, where d has power 3.
From the given options
is the right answers as it has the same variables and power.
Rest of other options are unlike terms to the given term.
Answer:
0.785398163 rad
Step-by-step explanation: