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X1 =A"sin" (omega t-0.1x) and x2=sin(ome...

`X_1 =A"sin" (omega t-0.1x)` and x_2=sin(omega t-0.1xx-phi/2)` resultant amplitude of combined wave is

A

`2A "cos" phi/4`

B

`A sqrt(2cosphi//2)`

C

`2A"cos"phi/2`

D

`A sqrt(2(1+"cos" phi/4))`

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The correct Answer is:
A
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