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Two S.H.Ms are given by y(1) = a sin ((p...

Two S.H.Ms are given by `y_(1) = a sin ((pi)/(2) t + (pi)/(2))` and `y_(2) = b sin ((2pi)/(3) t + (pi)/(2))` . The phase difference between these after 1 second is

A

`pi`

B

`(pi)/(2)`

C

`(pi)/(4)`

D

`(pi)/(6)`

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