1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   1 and 2 only
2. B
   2 and 3 only
3. C
   1 and 3 only
4. D
   1, 2 and 3

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   1 and 2 only
2. B
   2 and 3 only
3. C
   1 and 3 only
4. D
   1, 2 and 3

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   1
2. B
   $\sqrt{2}$
3. C
   $1+\sin^2\theta$
4. D
   $\frac{1+\sin^2\theta}{1-\sin^2\theta}$

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1. A
   $\frac{n\pi}{2}$
2. B
   $\frac{(2n+1)\pi}{2}$
3. C
   $n\pi$
4. D
   $2n\pi$ only

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1. A
   $\frac{n\pi}{2}$
2. B
   $\frac{(2n+1)\pi}{2}$
3. C
   $n\pi$
4. D
   $2n\pi$

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1. A
   1/3
2. B
   2/5
3. C
   3/4
4. D
   3/5

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1. A
   11/29
2. B
   22/49
3. C
   33/59
4. D
   44/69

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1. A
   $D > d$
2. B
   $D < d$
3. C
   $7D > 12d$
4. D
   None of the above

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1. A
   $p$
2. B
   $9p$
3. C
   $\frac{1}{p}$
4. D
   $p^2$

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1. A
   $pq$
2. B
   $p/q$
3. C
   $4p/5q$
4. D
   $1/(pq)$

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1. A
   $p:q = 7:2$
2. B
   $p^2:q^2 = 7:2$
3. C
   $p:q = 2:7$
4. D
   $p^2:q^2 = 2:7$

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1. A
   36
2. B
   144
3. C
   576
4. D
   864

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