Integral with hyperbolic functions
In this video we will find improper integrals with hyperbolic cosines and sines. To find them we will use some relations for the digamma function and differentiation with respect to a parameter - a trick that Richard Feynman loved.
The formulas for the digamma function used in this video are obtained here: • Дигамма-функция. Часть2. Интегральные пред...
A video about digamma functions in 2 parts, this is the 1st part: • Дигамма-функция. Часть1. Функциональные ур...
The value of cos(п/5) is found in this video: • Найдём "золотые" косинус и синус, использу...
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