Euler's identity is the famous mathematical equation eiπ + 1 = 0 or eiπ = -1 where e is Euler's number, also known as the base of the natural logarithm, approximately equal to 2.71828182846, i is the imaginary number where i2 = -1, and π is the ratio of a circle's circumference to the circle's diameter, approximately equal to 3.1415926535. Euler's Identity appears on the show Animation vs Math, where it fights The Second Coming (TSC) in a mathematically accurate battle.