Question

The function f(x) = |cos x| is

• A. Everywhere continuous and differentiable
• B. Everywhere continuous but not differentiable at odd multiples of $\frac{π}{2}$
• C. Neither continuous nor differentiable at $(2n+1)\frac{π}{2},n\in Z$
• D. Not differentiable everywhere

Answer 1

Answer: (B)

Everywhere continuous but not differentiable at odd multiples of $\frac{π}{2}$

Answer 2

The correct answer is Option (B) : Everywhere continuous but not differentiable at odd multiples of $\frac{π}{2}$