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Finding the Tangents of Angles

Source:

March 3, 2009
trigonometry

Problem Statement

If A \equal{} 20^{\circ} and B \equal{} 25^{\circ}, then the value of (1 \plus{} \tan A)(1 \plus{} \tan B) is (A) \sqrt3 \qquad (B)\ 2 \qquad (C)\ 1 \plus{} \sqrt2 \qquad (D)\ 2(\tan A \plus{} \tan B) <spanclass=′latex−bold′>(E)</span>  none of these <span class='latex-bold'>(E)</span>\ \text{ none of these}
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