# Math Help - Law of Cosines

1. ## Law of Cosines

Use the law of cosines to solve the triangle

C=108°
a=10
b=7

2. Originally Posted by ryno16
Use the law of cosines to solve the triangle

C=108°
a=10
b=7

$c^2 = a^2 + b^2 -2(a)(b)\cos{C}$

just plug in the values and solve