Zheldybayeva Б. , Koshchanova Г. , Amangosova А. , Dzhugembayeva Б. , Turebayeva Г. , Kasymkhanova А. , Syrbaeva Ш. , Kainbayeva Л. and Mukushev Б. 2025. Harmonic analysis of a periodic electrical signal using the Mathcad package. Recent Contributions to Physics. 96, 1 (Mar. 2025), 77–87. DOI:https://doi.org/10.26577/RCPh96120269.