What is the use of $i=\sqrt{-1}$ in plane wave equation?
98071
What does the complex electric field show?
138060
Using NSolve in the complex plane
3712
Why $\sqrt{-1 \cdot {-1}} \neq \sqrt{-1}^2$?
5526
Prove that $ℤ[i]^*= \{1,-1,i,-i\}$
77486
What is the value of $i^i$?
57239
Why is energy in a wave proportional to amplitude squared?
69854
Why is there a minus sign in this wave equation derivation?
127329
A problem about wave equation
67588
Why does $|e^{ix}|^2 = 1$?
55094
How to show $i^{-1} = -i$?
13727
Wave equation: $y=A \sin(\omega t-kx)$ or $y=A\sin(kx-\omega t)$?
86767
Using separation of variables to solve the wave equation
47313
What is $i^i$ and $(i^i)^i$
80710
Does $\int_{-1}^1 \frac 1 x dx$ equal zero?
144765
Solving $\sqrt{x+5} = x - 1$
25159
Why does the inverse of the Hilbert matrix have integer entries?
53958
General misconception about $\sqrt x$