Here is the rest of the passages for " PLEASE HELP I GOTTA GET THIS DONE BEFORE THE FIRST PT.2"

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

What could explain what happened when the time was equal to 120 minutes

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document