Sometimes the relation between two variables is neither explicit nor implicit, but some link of a third variable with each of the two variables, separately, estabilishes a relation between the first two variables. In such a situation, we say that the relation between them is expressed via a third variable, which is called the parameter. More precisely, a relation expressed between two variables x and y in the form x -f(t), y = g(t) is said to be parametric form with t as a parameter.
In order to find derivative of function in such form, we have by chain rule.
Second Order Derivative
