Derivatives of Trigonometric Functions
www.ocf.berkeley.edu › ~reinholz › edWe have already seen that the derivative of the sine function is the cosine function. Through a very similar we can find that the derivative of the cosine function is the negative sine function. Thus, d dx sin(x) = cos(x) and d dx cos(x) = −sin(x) It is useful to look at the graph of a function and its derivative together, to see just how much