Calculating Phase Angle in an AC Circuit: Practical vs. Theoretical Approaches

[mmmboh]

Hi , there is a circuit with AC voltage with a resistor followed by a capacitor in series, and at frequency 1760 Hz I need to know phase angle, the peak to peak separations for the voltage source to the voltage across the capacitor is 15 ms...how do I find the phase angle?

I already found it theoretically using arctan (wRC), but I'm not sure how to do it practically.

Thanks.

 

[mmmboh]

anyone?

 

[Redbelly98]

Compare the 15 ms to the time for a full oscillation period.

If the 15 ms were one-half of a period, then the phase angle is 180°.
If it's a quarter of a period, the phase s 90°.
Etc.