Question

Find x round to the nearest tenth. 25 points and marking the brainlist!!!!!

Answer 1

Answer:

$x=117.9^o$

Step-by-step explanation:

Since you are given the three sides, use the law of cosines, that is:

$2\,(50)\,(55) \,cos (x)=50^2+55^2-90^2\\cos(x)=\frac{-2575}{5500} =-\frac{117}{250} \\x=arccos(-\frac{117}{250})\\x=117.9^o$