Answer Happy

i wasnt given anyother information for this apprentky i need an equation for the displacent of the vibrations but it is not in the documents
Scenario 1 A support beam made from a fully elastic material is subjected to vibrations along its length, emanating from two machines situated at opposite ends of the beam. The displacement caused by the vibrations can be modelled by the following equations: Task 1 a) State the amplitude, phase, frequency and periodic time of each of these waves. b) When both machines are switched on, how many seconds does it take for each machine to produce its maximum displacement? c) At what time does each vibration first reach a displacement of? (nb if your first attempt reveals a negative answer you will need to re-think your approach) Task 2 a) Use compound angle formulae to expand and above into the form, where and are numbers to be found. b) Using your answers from part a Task 2, express in a similar form. Convert this expression into the equivalent form.