Question

How do you find the derivative of `(pi)(cos t - 1/t^2)`?

Answer 1

`dy/dt=-pisint+(2pi)/t^3`

Explanation:

First multiply out and use laws of exponents to write the function in a better form as follows :

`y=picost-pit^(-2)`

Now use normal rules of differentiation to find the derivative :

`therefore dy/dt=-pisint+2pit^(-3)`