In right triangle RST, ST = 5, RT = 12, and RS = 13.

find cos R

(i'm not able to show a pic sorry!)

4/13
12/5
12/13
5/12

2 answers

not sure where the finance comes in here, but
did you draw RST? If so, it should be clear that
cosR = adjacent/hypotenuse = RT/RS = 12/13
it's just a class name lol! i so appreciate you!