Hi, looking through some old notes about complex exponentials and I was wondering what does the integral of a complex exponential equate to, within the complex plane?
For example:
\(
\int_{0}^{\frac{\pi}{2}} e^{ix} dx = \int_{0}^{\frac{\pi}{2}} cos(x) + isin(x) dx = [sin(\frac{\pi}{2}) - icos(\frac{\pi}{2})] - [sin(0) - icos(0)] = [1 - 0] - [0 - i(1)] = 1 + i
\)
What I am reading this result as is: the integral of a unit circle in the complex plane from angle 0 to pi/2 is equal to "1 + i".
What does this "1 + i" mean for the complex plane? Doesn't seem to be the area under the curve.
Any ideas? Thanks!
For example:
\(
\int_{0}^{\frac{\pi}{2}} e^{ix} dx = \int_{0}^{\frac{\pi}{2}} cos(x) + isin(x) dx = [sin(\frac{\pi}{2}) - icos(\frac{\pi}{2})] - [sin(0) - icos(0)] = [1 - 0] - [0 - i(1)] = 1 + i
\)
What I am reading this result as is: the integral of a unit circle in the complex plane from angle 0 to pi/2 is equal to "1 + i".
What does this "1 + i" mean for the complex plane? Doesn't seem to be the area under the curve.
Any ideas? Thanks!