- #1
wellmoisturizedfrog
- 3
- 1
- TL;DR Summary
- Difficulty understanding when to add pi/2 vs when to subtract pi/2.
My transmissions line class often features problems where the voltage is expressed as a sin, not a cos. Obviously a phase shift of pi/2 is sufficient to convert between the two. However, I have trouble understanding when adding pi/2 is appropriate as opposed to subtracting pi/2. As per my understanding, both should be sufficient to achieve the desired conversion, but my professor says otherwise. While I understand that the angle should reflect the position of the phasor in the complex domain, I still feel as though I am missing something. Could anyone offer a concrete clarification of this matter?