An alternating current is given by $i=i_1 \sin \omega t+i_2 \cos \omega t$. The rms current is given by

Question

$\frac{i_1-i_2}{\sqrt{2}}$

$\sqrt{\frac{i_1^2+i_2^2}{2}}$

$\sqrt{\frac{i_1^2+i_2^2}{\sqrt{2}}}$

$\frac{i_1+i_2}{\sqrt{2}}$

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