Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
My first build :P
This is how I actually play Tryndamere.
You nearly always deal critical damage. You deal over 1000 damage each time you attack. You heal yourself more than 1/3 of your life in one attack.
You can easily solo the Baron.
You may think I am crazy with my def masteries but I'm not. Those are Tryn's only defense. (With his ultimate :D)