My teacher said to me that Instantaneous Angle means Argument of Complex Function thats all. Someone please tell me what significance does this "instantaneous" Word has here ?

  • $\begingroup$ was this function over time? $\endgroup$ – Memming Oct 31 '17 at 12:17
  • $\begingroup$ $f(t)$=$e^{j{({\Omega}t+\Phi_0})}$ where $${{\Omega}t+\Phi_0}$$ is instantaneous angle $\endgroup$ – fpsshubham Oct 31 '17 at 12:41
  • $\begingroup$ great. It's instantaneous at time $t$. $\endgroup$ – Memming Oct 31 '17 at 13:33

Instantaneous usually means the value of something right at this time. I think what this means in your case is that the function $f(t)$ is complex and you are taking the argument (finding the angle): $$ \theta(t) = \arg\left( f(t) \right) = {\rm atan}(\Im[f(t)],\Re[f(t)]) $$ where $\Im[ \cdot ]$ indicates taking the imaginary part and $\Re[ \cdot ]$ indicates taking the real part.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.