Use the Law of Cosines to find the values of x and y. (PLEASE HELPPP)

Step-by-step explanation:

Kindly refer to the image attached in the answer region for labeling of triangle.

AB = 16

BC = 19

AC = 15

We have to find the angles x and y i.e. .

Formula for cosine rule:

Where  

a is the side opposite to ,

b is the side opposite to  and

c is the side opposite to .

Similarly, for finding the value of y:

Hence, the values are:

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐