Answer:
sin(3x) = sin(x + 2x)
= sinx cos(2x) + cosx sin(2x)
= sinx [1 - 2sin2x] + cosx [2sinxcosx]
= sinx - 2sin3x + 2cos2xsinx
For part A just plug the numbers 2 through 5 for t for both function and see what numbers r the same and for part b it means that the two baseballs r gonna have the same height after t seconds
