Need the complete answers with steps for these three questions.

1. (p704, #32) Determine whether the sequence converges or diverges. If it converges, find the limit. Show all work. (That is, provide sufficient justification for your conclusion). an = Cos (n+ 1) 2. (p716, #62) Find the value(s) of x for which the series converges. Find the sum of the series for those value(s) of x. Show all work. (That is, provide sufficient justification for your conclusion). sin" x 3n n=0 3. (p726, #22) Determine whether the series is convergent or divergent. Show all work. (That is, provide sufficient justification for your conclusion). In n n2 n=2