Trigonometric functions (used in the trigonometric form of a complex number) are 2π-periodic, which means that for any arguments differing by e.g., 2π, 4π, 6π, they assume the same value.
Learn how to effectively use the substitution method in solving indefinite integrals. This article contains detailed tips and examples that will help you understand when and which substitutions to choose to simplify difficult integrals. Ideal for mathematics students starting their journey in integration, looking for practical advice and solutions.
Learn effective methods to avoid computational errors while calculating the rank and determinant of matrices. Discover how to properly conduct matrix operations to minimize the risk of mistakes and optimize your solutions.
In this post, I show how to derive the formula for the derivative of the square root of x from the definition of a derivative. Briefly, precisely, and step by step.
This lecture will be devoted to the Classical Method of Least Squares. You can of course also come across the name Classical Linear Regression Model, KMRL for short. Both names are correct and both are safe to use.
I will present and briefly discuss all the basic assumptions of this method.
It is worth knowing these assumptions, because very often this issue appears on the econometrics exam, but not only. I remember well that mentioning the assumptions of KMNK happened to me as one of the questions during the defense of my bachelor thesis.
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