From the bottom of a pole of height \( h \), the angle of elevation of the top of a tower is \( ....

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From the bottom of a pole of height \( h \), the angle of elevation of the top of a tower is \( \alpha \) and the pole
\( \mathrm{P} \)
subtends angle \( \beta \) at the top of the tower. The height
W
of the tower is
(1) \( \frac{h \cot (\alpha-\beta)}{\cot (\alpha-\beta)-\cot \alpha} \)
(2) \( \frac{h \tan (\alpha-\beta)}{\tan (\alpha-\beta)-\tan \alpha} \)
(3) \( \frac{\cot (\alpha-\beta)}{\cot (\alpha-\beta)-\cot \alpha} \)
(4) None of these
.


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