-_-. As for leveling up, the exp caps at about 70,000 after 15 minutes. So you can't leave your game on for a whole day in hopes of getting a million exp. xD Just let the MC smack these guys around for a good 20 minutes and he'll level up 2-3 times. It's guaranteed the best way to level up in the game.
tanÂ·gent. n. 1. Mathematics. a. A line, curve, or surface meeting another line, curve, or surface at a common point and sharing a common tangent line or tangent plane at that point.
The tangent is the ratio of the opposite side to the adjacent side. The simplest triangle you can use that has that ratio is shown. It has an opposite side of length 2 and an adjacent side of length 5. You could have used a triangle that has an opposite side of length 4 and an adjacent side of length 10.