# Chain Rule

While finding the derivatives of a function we apply different rules like product rule, quotient rule or chain rule. These rules are applied according to the types of functions.

Usually the functions are mentioned in explicit form $y$ = $f\ (x)$ or in the implicit form $f\ (x,\ y)$ = $constant$.

Usually the functions are mentioned in explicit form $y$ = $f\ (x)$ or in the implicit form $f\ (x,\ y)$ = $constant$.

The chain rule is applied for the functions which are expressed in explicit form. Initially we understand that the function is in composite form and then split it into different functions and then apply chain rule.

The chain rule can be applied for the exponential functions, logarithmic functions, inverse trigonometric functions etc.In this section let us see the proof and the method of finding the derivatives using chain rule. We also have some practice problems and their Answers at the end of this unit.