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If two SHMs are represented by equations...

If two SHMs are represented by equations `y_1`= 4 sin[3`pi`t + (`pi`/3)], `y_2`= 4 [sin(3`pi`t) +`sqrt 3` cos (3`pi`t)], then the ratio of their amplitudes is

A

2:1

B

1:2

C

`sqrt 3` : 1

D

1 :` sqrt 3`

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