Question

The derivative of cos(x/2) is

Answer 1

Answer:

here your answer

Explanation:

We will need to employ the chain rule. In other words, just treat x2 like a whole variable, differentiate the outside function first, then multiply by the derivative of x2 . We know that the derivative of cosu is −sinu , where u is anything - in this case it is x2 . And the derivative of x2 is 2x .