Abstract
Mathematically and using statistical methods it was proved that, interdisciplinary connections help educators to develop new, effective methods that positively effect on mathematical achievement of students and additionally enable us to solve unsolvable mathematical problems (S.N., 1965, M.M.) and easily solve engineering problems (S.N. Kharin, M.M., Nouri, Davies, Kharin 2003). We consider developed method as effective, if it enables us to solve pedagogical, mathematical and practical problems. During the pedagogical experiment it was shown that new developed methods are easier and more understandable. During the data analyzes SPSS (Statistical Packet for Social Sciences) computer program was used.