2. For this problem, you need only turn in work / evidence of completion for the last part of the

problem.

(a) Go look up the formulas for sin(a+ß) and cos(a + 3).

(b) Refresh your memory on the facts that i =√1 and ² = -1.

(c) Prove using the principle of mathematical induction:

for all n EN with n > 1.