Seminar problems posted

As was pointed out, I was about to re-assign problems again. Therefore, the problems I have now assigned, are a bit different from the suggestion I posted earlier this week.

Problems for seminar 6 will be taken from the compendium, chapters 4 (the remaining) and 5. Skip those which involve "sin" or "cos", or if you would give them a shot as well: the sin function has the property (sin t)' = cos t, while the cos function has the property (cos t)' = - sin t.