MCQOPTIONS
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| 1. |
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 |
| A. | \(\left\{ -\frac{\pi }{4},0,\text{ }\!\!~\!\!\text{ }\frac{\pi }{4} \right\}\) |
| B. | \(\left\{ -\frac{\pi }{2},-\frac{\pi }{4},\frac{\pi }{4},\frac{\pi }{2} \right\}\) |
| C. | \(\left\{ -\frac{3\pi }{4},-\frac{\pi }{4},\frac{3\pi }{4},\frac{\pi }{4} \right\}\) |
| D. | \(\left\{ -\frac{3\pi }{4},-\frac{\pi }{2},\frac{\pi }{2},\frac{3\pi }{4} \right\}\) |
| Answer» D. \(\left\{ -\frac{3\pi }{4},-\frac{\pi }{2},\frac{\pi }{2},\frac{3\pi }{4} \right\}\) | |