Question

Find mZA.
Round to the nearest degree.
10
10
B
13
11

Answer 1

Explanation:

`{13}^(2) = {10}^(2) + {11}^(2) - 2 * (11)(10) \cos(a) \\ 169 = 100 + 121 - 110 \cos(a) \\ 52 = 110 \cos(b) \\ \cos(b) = (26)/(55) \\ b = 61.78 \: degrees`

.....