Answer:
m∠S = 54.1°
Step-by-step explanation:
Use the law of cosines
[tex]s^{2} = t^{2} + u^{2} - 2utcos S\\6.1^{2} = 3.2^{2} + 7.4^{2} - 2(3.2)(7.4) cos S[/tex]
37.21 = 10.24 + 54.76 - 47.36 cos S
-27.79 = -47.36 cos S
.586782 = cos S
arccos .586782 = S
m∠S = 54.1°
