Question

the number of points where the function f(x)=min(|tanx|,cos|x|) is non differentiable in the interval (-π,π)

Answer 1

Given function :-

$f(x)=min (|tanx|,cos|x|)$

is non differentiable at the interval$(-\pi,\pi )$

From the figure we can say that,

it is continuous and non continuous at the 2 points,

that means we have total 4 points,

Thus, the number of points required is 4.