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The bob of a simple pendulum of length \( L \) is released at time \( t=0 \) from a position of small
\( \mathrm{P} \) angular displacement. Its linear displacement at

W time \( t \) is given by:
(1) \( X=a \sin 2 \pi \sqrt{\frac{L}{g}} \times t \)
(2) \( X=a \cos 2 \pi \sqrt{\frac{g}{L}} \times t \)
(3) \( X=a \sin \sqrt{\frac{g}{L}} \times t \)
(4) \( X=a \cos \sqrt{\frac{g}{L}} \times t \)
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