# What is the second derivative of #f(x)=cos(1/x) #?

##### 1 Answer

May 28, 2018

#### Explanation:

Here,

Diff.w.r.t. **using Chain Rule :**

Again diff.w.r.t. **using Quotient Rule :**

May 28, 2018

Here,

Diff.w.r.t. **using Chain Rule :**

Again diff.w.r.t. **using Quotient Rule :**