The line of best fit on a scatter plot diagram is used for?

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

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

What is the domain of the step function f(x)=[2x]-1?