Graphing by Calculator: For the combinations of sine and cosine functions in Problems 1-3, do the following?
(a) Use a graphing calculator or computer to sketch the graph of each function.
(b) From your graphs, estimate the amplitude, period, and phase shift (/(0 of resulting oscillation.
(c) Write each function in the form A cos((0 t-().
1. x(t) = cost + sin t
2. x(t) = 2cost + sin t
3. x(t) = 5 cos 3t + sin 3t