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Solve the Problem $\sqrt { \frac { 1 + \cos 18 ^ { \circ } } { 1 - \cos 18 ^ { \circ } } }$

Question 285

Multiple Choice

Solve the problem.
- $\sqrt { \frac { 1 + \cos 18 ^ { \circ } } { 1 - \cos 18 ^ { \circ } } }$

A) $\tan 9 ^ { \circ }$
B) $\cos 9 ^ { \circ }$
C) $\cot 9 ^ { \circ }$
D) $\sin 9 ^ { \circ }$

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