A vertical tower \( A B \) has its end \( A \) on the level ground. Let \( C \) be the midpoint ....

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A vertical tower \( A B \) has its end \( A \) on the level ground. Let \( C \) be the midpoint of \( A B \) and \( P \) be a
\( \mathrm{P} \)
point on the ground such that \( A P=2 A B \). If \( \angle B P C=\beta \),
W
then \( \tan \beta \), is equal to
(1) \( 1 / 9 \)
(2) \( 2 / 9 \)
(3) \( 3 / 7 \)
(4) \( 2 / 7 \)

(4)(D)(8) (9)


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