Science and Education Publishing American Journal of Software Engineering 2 1 2014 05 22 Evaluating Some Types of Definite Integrals 13 15 EN Chii-Huei Yu Department of Management and Information, Nan Jeon University of Science and Technology, Tainan City, Taiwan AJSE2014213 10.12691/ajse-2-1-3 2014 03 31 2014 05 22 2014 05 22 This paper studies three types of definite integrals. The infinite series forms of these definite integrals can be obtained using Parseval's theorem. In addition, we provide some examples to do calculation practically, and Maple is used to calculate the approximations of some definite integrals and their solutions for verifying our answers.