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Two harmonic motions are represented by ...

Two harmonic motions are represented by the equations `y_1 = 10 sin(3pi t + pi/4)`
`y_2 = 5(sin 3 pi t + sqrt3 cos 3 pi t)`
their amplitudes are in the ratio

A

`2:1`

B

`1:2`

C

`1:1`

D

`4:1`.

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