Tension in the string of an oscillating pendulum

1. A.
   $2mg$
2. B.
   $mg\left(1+\dfrac{A}{l^2}\right)$
3. C.
   $mg\left(1+\dfrac{A^2}{l^2}\right)$
4. D.
   $mg\left(1+\dfrac{A}{l}\right)$

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1. A.
   $\cos^{- 1}(0.75)$
2. B.
   $\ \cos^{- 1}(0.5)$
3. C.
   $\sin^{- 1}(0.5)$
4. D.
   $\ \sin^{- 1}(0.75)$

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1. A.
   $\cos^{-1}(0.75)$
2. B.
   $\cos^{-1}(0.5)$
3. C.
   $\sin^{-1}(0.5)$
4. D.
   $\sin^{-1}(0.75)$

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1. A.
   $\left[mg - \left(\dfrac{A}{L}\right)^2\right]$
2. B.
   $\left[mg + \left(\dfrac{A}{L}\right)^2\right]$
3. C.
   $mg\left[1 + \left(\dfrac{A}{L}\right)^2\right]$
4. D.
   $mg\left[1 - \left(\dfrac{A}{L}\right)^2\right]$

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