Find the angle between the angle bisectors of a linear pair.

What are correct trigonometric ratios that could be used to determine the length of ln

Turner's mom measured his room to see how long the wallpaper border needed to be. if two walls are 15 feet long and two walls are 12 feet long, how long should the strip of border be cut?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.