Please help with explanation of solutions to problems #2-5. See attached photos. The answers are also below.

2. The voltage from a generator can be modelled withthe equation V(t) = 120sin 100nt, where is the voltage in volts and t is the time in seconds. Find the absolute maximum and minimum voltage levels, and the times at which they occur. 3. The horizontal displacement of a particle can be modelled with the equation d(t) = 2sin~ t + sin ~ t, 0