If angle subtended by any chord of a rectangular hyperbola at the centre is ' \( \alpha \) ' and....

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If angle subtended by any chord of a rectangular
\( \mathrm{P} \)
hyperbola at the centre is ' \( \alpha \) ' and angle between the
W
tangents at ends of chord is \( \beta \) then
(1) \( \alpha=2 \beta \)
(2) \( \beta=2 \alpha \)
(3) \( \alpha+\beta=\pi \)
(4) \( \alpha+\beta=\pi / 2 \)


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