Hello. I have been looking into trigonometric identities that helps to simplify a question in mathematics. But the question that I have is, why do I need to simplify a question? For instance: Sin(x) * Cos(x) means Sin(2*x)/2. I have no answer that tells me why I simplify Sin(x) * Cos(x) to its corresponding answer. I have plotted graphs of Sin(x) * Cos(x) and Sin(2*x)/2 and both the expression give the same result. I request you to write all the words associated with this question. Thank you.