Perhaps 90° + k*180° are in fact valid, as 1 to any power is 1, and more importantly the function does approach 1 as x approaches 90°, etc.
blackjack
<a href="http://c.casalemedia.com/c?s=51816&f=3&id=0" target="_blank"><img src="http://as.casalemedia.com/s?s=51816&u=http://perplexus.info&f=3&id=0&if=0" width="120" height="600" border="0"></a>
flooble's webmaster puzzle
re: solution -- on second (or third) thought
