Easy vs Hard - Evaluating Trigonometric Functions

In this course, I understood once again how important trigonometry is.Because it's about numbers, theories and more..think it's very important because it's in our lives. Of course, we find the degrees in this regard and show them on the system and this is an incredible thinging. We should not only be content with knowing this, because since many subjects in mathematics are interconnected, we need to have knowledge of other sub-topics related to the title of that subject.For example, we need to know radical numbers like in this video and we need to perform operations accordingly.It was a great lesson and I realized once again how important mathematics is as a branch of science. Thank you.