Answer
(a) covered; can differentiate
(b) not covered; can not differentiate yet
(c) not covered; can not differentiate yet
Work Step by Step
a) The function $ y=3\cos x \cot x $ can be differentiated by the product rule (covered in 3.3) and using derivatives of trigonometric functions (covered in this section).
(b) The function $ y=\cos x^2 $ can be differentiated by the chain rule. However, we have not yet covered the chain rule (covered in 3.7)
(c) We have not yet covered how to derive $2^x$ (covered in 7.1).
