Unity Power Factor Correction from Waveforms
No, you can't assume from the fact the the C &amp; L current is 180 deg. out of phase -- you'd need to know the magnitude of each component's current also.

Else -- you could use any value of C &amp; L and come to the same conclusion.

But since RT is real, and the voltage on each side is in pause, then the voltage across it is in phase ==> the current is in phase...