Day 200: NDA Maths

1. A.
   1
2. B.
   11
3. C.
   120
4. D.
   121

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1. A.
   parallel to x-axis
2. B.
   parallel to y-axis
3. C.
   parallel to z-axis
4. D.
   equally inclined to all the axes

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1. A.
   $\frac{2^{-\frac{\pi}{6}}(6\ln 2-\sqrt{3}\pi)}{6}$
2. B.
   $\frac{2^{\frac{\pi}{6}}(6\ln 2+\sqrt{3}\pi)}{6}$
3. C.
   $\frac{2^{-\frac{\pi}{6}}(6\ln 2+\sqrt{3}\pi)}{6}$
4. D.
   $\frac{2^{\frac{\pi}{6}}(6\ln 2-\sqrt{3}\pi)}{6}$

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1. A.
   $\dfrac{x}{a}+\dfrac{y}{b}+\dfrac{z}{c}=1$
2. B.
   $\dfrac{a}{x}+\dfrac{b}{y}+\dfrac{c}{z}=1$
3. C.
   $\dfrac{a}{x}+\dfrac{b}{y}+\dfrac{c}{z}=2$
4. D.
   $\dfrac{x}{a}+\dfrac{y}{b}+\dfrac{z}{c}=2$

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1. A.
   $(-\infty,4)\cup(4,\infty)$
2. B.
   $[4,\infty)$
3. C.
   $(1,4)\cup(4,\infty)$
4. D.
   $[1,4)\cup(4,\infty)$

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