Answer:
4x^2
Step-by-step explanation:
Answer:
Option c
Step-by-step explanation:
We assume that the angle is in the first quadrant.
Observe the attached image.
if 
So:

By definition:

So:
adjacent side = 3
hypotenuse = 5.
Observe the attached image
We find the opposite side "x" using the Pythagorean theorem.

Then, for the angle u:
