100 points asap

angle alpha lies in quadrant ii, and tan alpha = -12/5. angle beta lies in quadrant iv, and cos beta = 3/5. what is the exact value of cos(alpha-beta)?

40 describe the outliers from the scatter plot.

Asinusoidal function whose frequency is 1/6pi

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters