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An ac is given by equation I=(I1) cos om...

An ac is given by equation `I=(I_1) cos omega t + (I_2) sin omega t`. The rms value of current is given by

A

`(1)/(sqrt(2))(i_(1)+i_(2))`

B

`(1)/(sqrt(2))(i_(1)+i_(2))^(2)`

C

`(1)/(sqrt(2))(i_(1)^(2)+i_(2)^(2))^(1//2)`

D

`(1)/(2)(i_(1)^(2)+i_(2)^(2))^(1//2)`

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