Proposal Removal of the unit-circle tag The unit-circle tag has just been created. It doesn't seem to me that the concept of unit circle deserves a tag.

It is known that the diameter of a particular type of automobile tyre follows a normal distribution with mean and variance being $600$ millimetres and $3$ millimetres respectively. Ten samples are collected from a large population of manufactured tyres as : It is believed that the manufactured ...

The decimal representations of $\frac{1}{7},\frac{2}{7},\frac{3}{7},\frac{4}{7},\frac{5}{7},\frac{6}{7}$ are $0.\overline {142857}, 0.\overline {285714}, \dots ,0.\overline {857142}$, which surprisingly are all cyclic shifts of each other. Is this a coincidence? This was my initial question, an...