Day 371: NDA Maths

1. A.
   1 : 1
2. B.
   10 : 9
3. C.
   100 : 91
4. D.
   5 : 4

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1. A.
   $\tan\left(\dfrac{A}{2}\right)$
2. B.
   $\cot\left(\dfrac{A}{2}\right)$
3. C.
   $2\tan\left(\dfrac{A}{2}\right)$
4. D.
   $2\cot\left(\dfrac{A}{2}\right)$

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1. A.
   $[1,\infty)$
2. B.
   $(0,\infty)$
3. C.
   $\left(\dfrac{1}{2},\infty\right)$
4. D.
   None of the above

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1. A.
   Zero (No solution)
2. B.
   One
3. C.
   Two
4. D.
   Three

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1. A.
   5, 2
2. B.
   2, 5
3. C.
   1, 0
4. D.
   0, 0

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