Problems for Monday ...

... were posted yesterday, but I forgot to put up a message on it. 

... and a speak of the devil digression: yesterday, when you got the sin function introduced, programmer Bruce Dawson posted this about how even your computer maybe doesn't compute it well enough: http://randomascii.wordpress.com/2014/10/09/intel-underestimates-error-bounds-by-1-3-quintillion/
For all those times you simply cannot live without a quad-precision numerical pi (that happens every day, doesn't it?) - check what CPU you are using :-o