NEEED ASAPPP pls answer correctly

Cosine.

Step-by-step explanation:

By definition, cos A = adj./hypotenuse. That is, the cosine of an angle is equal to the ratio of the adjacent side to the angle to the hypotenuse of the triangle.

As such, your answer is cosine.

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square