[kevinkevin]

  I was experimenting with trig equations and logarithms and I was wondering if there are any helpfull or intresting relations that can be made applying logarithms to trig?  I did a quick internet search but it yeilded no helpfull results.  Thanks.   

[Jorriss]

I don't know any interesting identities but there are logarithmic forms of the inverse trig functions.