Question

Which equation would you use to find the measure of angle S?

a. 4^2=7^2+9^2-2(7)(9)cos S
b. 7^2=4^2+9^2-2(4)(9)cos S

The triangle can be seen below:

Answer 1

use
\[7^2=4^2+9^2-2(4)(9)\cos (S) \] because \(S\) is the angle opposite the side with length 7

Answer 2

Okay! Thank you so much! =)

Answer 3

yw