If x = A cos 4t + B sin 4t, then \(\dfrac{d^2x}{dt^2}\) is equal to

1.	If x = A cos 4t + B sin 4t, then \(\dfrac{d^2x}{dt^2}\) is equal to -
A.	-16 x
B.	16 x
C.	x
D.	-x
Answer» B. 16 x

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If x = A cos 4t + B sin 4t, then \(\dfrac{d^2x}{dt^2}\) is equal to -

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