For this case we have the following functions:

The first thing we must do is calculate the sum of functions or equivalently:

We have then:

To complete the sum, we must add the terms whose exponents are equal.
We have then:

Then, we evaluate the function for x = 2:

Rewriting we have:
Answer:
Answers is 2in
Step-by-step explanation: 6in•6in=36in•2in=72in

The given pair of angles doesn't form any special pair of angles provided in the options , hence the Correct choice is none of these.
Greater=19
Smaller=3
Just use substitution