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

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1. A
   $-1$
2. B
   $0$
3. C
   $1$
4. D
   $2$

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1. A
   -1
2. B
   0
3. C
   1
4. D
   4

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1. A
   $\sin 50°$
2. B
   $\cos 50°$
3. C
   $1/\sqrt{2}$
4. D
   0

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1. A
   $\frac{a}{b}$
2. B
   $\frac{b}{a}$
3. C
   $\frac{a+b}{a-b}$
4. D
   $\frac{a-b}{a+b}$

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1. A
   0
2. B
   3
3. C
   $\frac{5\sqrt{2}}{2}$
4. D
   $\frac{3\sqrt{2}}{2}$

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

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

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1. A
   $-2$
2. B
   $-1$
3. C
   $2$
4. D
   $1$

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1. A
   $\dfrac{\sin 9° + \cos 9°}{\sin 9° - \cos 9°}$
2. B
   $\dfrac{\sin 9° - \cos 9°}{\sin 9° + \cos 9°}$
3. C
   $\dfrac{\cos 9° + \sin 9°}{\cos 9° - \sin 9°}$
4. D
   $\dfrac{\sin 36°}{\cos 36°}$

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1. A
   $2$
2. B
   $4$
3. C
   $2\sqrt{3}$
4. D
   $4\sqrt{3}$

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1. A
   $q - p = 1$
2. B
   $p - q = 1$
3. C
   $p + q = 2$
4. D
   $p + q = 3$

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

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

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1. A
   $\dfrac{1}{x} + \dfrac{1}{y}$
2. B
   $\dfrac{1}{y} - \dfrac{1}{x}$
3. C
   $\dfrac{xy}{x+y}$
4. D
   $1 + \dfrac{1}{xy}$

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1. A
   $0°$
2. B
   $28°$
3. C
   $38°$
4. D
   $52°$

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

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1. A
   -1
2. B
   0
3. C
   1
4. D
   2

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1. A
   -1
2. B
   0
3. C
   1
4. D
   2

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

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