Brainliest answer to first ! select the angle that correctly completes the law of cosines for this triangle. 12^2+13^2-2(12)(13)cos__=5^2 answers in pic.

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,

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints

i dont know sorry

step-by-step explanation: