A projectile has initially the same horizontal velocity as it would acquire if it had moved from...

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A projectile has initially the same horizontal velocity as it would acquire if it had moved from rest with uniform
\( \mathrm{P} \) acceleration of \( 3 \mathrm{~m} \mathrm{~s}^{-2} \) for \( 0.5 \mathrm{~min} \). If the maximum height

W reached by it is \( 80 \mathrm{~m} \), then the angle of projection is \( \left(g=10 \mathrm{~m} \mathrm{~s}^{-2}\right) \)
(1) \( \tan ^{-1} 3 \)
(2) \( \tan ^{-1}(3 / 2) \)
(3) \( \tan ^{-1}(4 / 9) \)
(4) \( \sin ^{-1}(4 / 9) \)
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