## Leonhard Euler

## Leonhard Euler

Leonhard Euler (15.04.1707, Switzerland) is a Swiss mathematician who is known as one of the inventors of pure mathematics since he is the founder of the calculus of variations, geometry, mechanics, number theory. He demonstrated the application of mathematics in physics and technology. He worked on the trigonometric

functions and center of gravity on a triangle. He is the mathematician who discovered the intersection point of heights from different sides of an angle. He represented the values of trigonometric functions as a parameter of geometric lines’ length. In his prior work “Introduction to Analysis of Infinity”, he defined the “Infinity”.

He is a pioneer in the Terminology of Mathematics. He proved one of the most crucial theorems on logarithms as his initial is recognized as the base of all-natural logarithms. Euler’s Identity Equation is the combination of complex numbers and trigonometry. Euler’s Identity states that eiθ = cos θ + i sin θ), with complex numbers (e.g., 3 + 2-1. . He proved the imaginary algorithms of negative numbers and declared that each complex number has infinitely many algorithms. His first publication has served as the foundation of calculus since he wrote the primary formulas of differentiation and numerous methods of indefinite integration. He worked on Euler’s Three-Body Problem as a tutor of three Russian mathematicians, however even after working on it for fifteen years, this problem is still not solved. He discovered the reciprocal of a quadratic function, and this law of quadratic reciprocity, as part of the number theory, is awarded twelve times by the Paris Academy Prize, and now there is a prize named after him.