What is the derivative of cos x?
The derivative of a function characterizes the rate of change of the function at some point. The process of finding the derivative is called differentiation.
Answer: The derivative of cos x is -sin x.
Let's understand how we arrived at the solution.
y = cos x
Differentiating w.r.t x
dy/dx = [d/dx(cos x)]
dy/dx = -sin x
Also, we can check out the online derivative calculator to verify our answer.