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Y=A sin(omega t+phi(0)) is the time-disp...

`Y=A sin(omega t+phi_(0))` is the time-displacement equation of a SHM. At `t=0` the displacement of the particle is `Y=(A)/(2)` and it is moving along negative x-direction. Then the initial phase angle `phi_(0)` will be: ,
(1) `(pi)/(6)`
(2) `(2 pi)/(3)`
(3) `(5 pi)/(6)`
(4) `(pi)/(3)`

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