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2. Integration using Euler's formula - Wikipedia

   en.wikipedia.org/wiki/Integration_using_Euler's...

   In integral calculus, Euler's formula for complex numbers may be used to evaluate integrals involving trigonometric functions. Using Euler's formula, any trigonometric function may be written in terms of complex exponential functions, namely e i x {\displaystyle e^{ix}} and e − i x {\displaystyle e^{-ix}} and then integrated.

3. Six exponentials theorem - Wikipedia

   en.wikipedia.org/wiki/Six_exponentials_theorem

   The strong six exponentials theorem then says that if x 1, x 2, and x 3 are complex numbers that are linearly independent over the algebraic numbers, and if y 1 and y 2 are a pair of complex numbers that are also linearly independent over the algebraic numbers then at least one of the six numbers x i y j for 1 ≤ i ≤ 3 and 1 ≤ j ≤ 2 is ...

4. Euler's formula - Wikipedia

   en.wikipedia.org/wiki/Euler's_formula

   In fact, the same proof shows that Euler's formula is even valid for all complex numbers x. A point in the complex plane can be represented by a complex number written in cartesian coordinates. Euler's formula provides a means of conversion between cartesian coordinates and polar coordinates. The polar form simplifies the mathematics when used ...

5. Complex number - Wikipedia

   en.wikipedia.org/wiki/Complex_number

   A complex number can be visually represented as a pair of numbers (a, b) forming a vector on a diagram called an Argand diagram, representing the complex plane. Re is the real axis, Im is the imaginary axis, and i is the "imaginary unit", that satisfies i 2 = −1.

6. Four exponentials conjecture - Wikipedia

   en.wikipedia.org/wiki/Four_exponentials_conjecture

   Let λ 1, λ 2, and λ 3 be any three logarithms of algebraic numbers and γ be a non-zero algebraic number, and suppose that λ 1 λ 2 = γλ 3. Then λ 1 λ 2 = γλ 3 = 0. The exponential form of this conjecture is the following. Let x 1, x 2, and y be non-zero complex numbers and let γ be a non-zero algebraic number. Then at least one of ...

7. cis (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Cis_(mathematics)

   x is the argument of the complex number (angle between line to point and x-axis in polar form). The notation is less commonly used in mathematics than Euler's formula , e ix , which offers an even shorter notation for cos x + i sin x , but cis(x) is widely used as a name for this function in software libraries .