Select the angle that correctly completes the law of cosines for this triangle. 122 +132 - 2(12)(13)cos ___ = 52 67° 13 5 Ол 90° 23° 12 O A. 23° B. 90°

Hmmm?

Option B is correct i.e,  

Explanation:

Law of cosine is useful to find:

* The third side of a triangle when we know two sides and angle between them.

* The angles of a triangle when we know all three sides.

It can be either of these forms;

Given triangle ABC is right angle triangle.

Law of cosines for this triangle is,

since, ,  and .

then,

Step-by-step explanation:

1 + (6 / x - 1)

step-by-step explanation:

divide using polynomial division.