With the popularity of World-Wide Web (WWW) in the past few years, it becomes a popular medium to pass teaching materials. Some classes in some universities have employed World-Wide Web as their teaching environments. In turn, the purpose of this project is to introduce high school students about how the materials in their trigonometry class apply to the area of communication in electrical engineering with WWW. Another objective in use the WWW as a teaching aid is to learn the new ever-increasing popular programming language -- JAVA.