With or without our knowledge the basics of trigonometry are taught in elementary school even if the topic is not included in the syllabus. A foundation is like a pillar to lean on. Without it we would not be able to proceed. When in doubt during the later stages of...
Much of what a learner has to do should be built on foundation rather than assumptions. Very often the initial effort of the student has to go towards developing an approach conducive to learning. Unfortunately, this is not for the most part, the case in practice....
