Question

Let S be the set of all points in (-π,π) at which the function, f(x) = min{sin x, cos x} is not differentiable. Then S is a subset of which of the following?
1. {-3π/4, -π/4, π/4, 3π/4}
2. {-3π/4, -π/2, π/2, 3π/4}
3. {-π/2, -π/4, π/4, π/2}
4. {-π/4, 0, π/4} ​

Answer 1

Explanation:

the correct opition is 1.

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