The top of a hill observed from the top and bottom of a building of height \( \mathrm{h} \) is a...

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The top of a hill observed from the top and bottom of a building of height \( \mathrm{h} \) is at angles of elevation \( \mathrm{p} \) and \( \mathrm{q} \) respectively. The height of the hill is
\( \mathrm{P} \)
(A) \( \frac{h c o t q}{\operatorname{cotq}-\operatorname{cotp}} \)
(B) \( \frac{h \operatorname{cotp}}{\operatorname{cotp}-\cot q} \)
W
(C) \( \frac{h \tan p}{\tan p-\tan q} \)
(D) none of these
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