Day 307: NDA Maths

1. A.
   $\left(-\dfrac{\pi}{2},\dfrac{\pi}{2}\right)$
2. B.
   $\left[-\dfrac{\pi}{2},\dfrac{\pi}{2}\right]$
3. C.
   $\left[0,\dfrac{\pi}{2}\right]$
4. D.
   $[0,\pi]$

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1. A.
   $-1$
2. B.
   $0$
3. C.
   $\dfrac{1}{2}$
4. D.
   $1$

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1. A.
   $6$
2. B.
   $10$
3. C.
   $14$
4. D.
   $16$

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1. A.
   $x \in (0, \infty)$
2. B.
   $x \in \left(\frac{1}{7}, 7\right)$
3. C.
   $x \in \left(0, \frac{1}{7}\right) \cup (7, \infty)$
4. D.
   $x \in \left(\frac{1}{7}, \infty\right)$

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1. A.
   Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
2. B.
   Both Statement-I and Statement-II are correct but Statement-II does not explain Statement-I
3. C.
   Statement-I is correct but Statement-II is not correct
4. D.
   Statement-I is not correct but Statement-II is correct

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