I think any of these would work
10;18
15;28
20;35
Answer:
hope this will help you......
42 and 17 millionsth.....
First, we expand the equation:

Then, we combine certain terms in order to simplify them using trigonometry identities.

Note these identities:
Pythagoran relation:

Sum and Difference Formula/Identities:

Thus, if we apply these identities, the simplified equation would be:

Simplying further, the answer would be