A.The sum of two products; there are two terms
Answer:

Step-by-step explanation:
In any right triangle, the cosine of an angle is equal to its adjacent side divided by the hypotenuse, or longest side, of the triangle.
In the given triangle, the adjacent side to angle P is marked as
and the hypotenuse of the triangle is
. Therefore, we have:

Would the common factor be 1?
edit
the least common is 1 and the most common is 2
thanks andreadiaz2003