RMS value of the current I1 sin(wt) + I2 cos(wt)

1. A.
   $\sqrt{\frac{I_{1}^{2} - I_{2}^{2}}{2}}$
2. B.
   $\sqrt{\frac{I_{1}^{2} + I_{2}^{2}}{2}}$
3. C.
   $\frac{I_{1} + I_{2}}{\sqrt{2}}$
4. D.
   $\frac{I_{1} + I_{2}}{2\sqrt{2}}$

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1. A.
   $\frac{1}{2}\left( i_{1}^{2} + i_{2}^{2} \right)^{\frac{1}{2}}$
2. B.
   $\frac{1}{\sqrt{2}}\left( i_{1}^{2} + i_{2}^{2} \right)^{\frac{1}{2}}$
3. C.
   $\frac{1}{\sqrt{2}}\left( i_{1} + i_{2} \right)^{2}$
4. D.
   $\frac{1}{\sqrt{2}}\left( i_{1} + i_{2} \right)$

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1. A.
   $\sqrt{I_{A}^{2} + I_{B}^{2}}$
2. B.
   $\frac{\sqrt{I_{A}^{2} + I_{B}^{2}}}{2}$
3. C.
   $\sqrt{\frac{I_{A}^{2} + I_{B}^{2}}{2}}$
4. D.
   $\frac{\left| I_{A} + I_{B} \right|}{\sqrt{2}}$

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