Question 1197936
<font color=black size=3>
Law of Cosines
c^2 = a^2+b^2 - 2ab*cos(C)
7^2 = 5^2+6^2 - 2*5*6*cos(C)
49 = 61 - 60*cos(C)
cos(C) = (49-61)/(-60)
cos(C) = 0.2
C = arccos(0.2)
C = 78.4630409671846


Answer: Angle C is approximately 78.463 degrees
</font>