A flexible chain of weight \( \mathrm{W} \) hangs between two fixed...

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A flexible chain of weight \( \mathrm{W} \) hangs between two fixed points A and B which are at the same horizontal
\( \mathrm{P} \) level. The inclination of the chain with the horizontal at both the points of support is \( \theta \). What is the tension
W of the chain at the mid-point?
(1) \( \frac{W}{2} \cdot \operatorname{cosec} \theta \)
(2) \( \frac{W}{2} \cdot \tan \theta \)
(3) \( \frac{W}{2} \cdot \cot \theta \)
(4) None
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