Modified Gerasimov-Caputo formula

In this work, modified Gerasimov-Caputo formulas were obtained for the first time. The modified formulas take into account the value of the derivative of the function at zero with an order of one less than the order of the derivative under the sign of the Gerasimov-Caputo integral. Without taking into account the new term in the Gerasimov-Caputo formulas, it is not always possible to calculate the fractional derivative on any order interval and for any function. The paper also describes a simple numerical algorithm with the Gaussian quadrature formula, which allows one to calculate the fractional derivative with double precision. tables of fractional derivatives for the sine and cosine functions have been compiled. Moreover, the first half of the tables (in the interval of order (0,1)) and the second half of the tables (in the interval of order (1,2)) were obtained by programs using different algorithms. In the work, an absolute error in calculating the fractional derivative of 10-15 was achieved.