Regarding uses of $i$ (square root of $-1$)
23265
"Where" exactly are complex numbers used "in the real world"?
54030
Square and square root and negative numbers
41645
Checking my understanding: $1 - 1 + 1 - 1 + 1 - ... = \frac{1}{2}$
124209
How is $\ln(-1) = i\pi$?
53958
General misconception about $\sqrt x$
143207
What is $\sum\limits_{i=1}^n \sqrt i\ $?
148074
Analytic expression for the primitive of square root of a quadratic
128091
Find the range of possible values of $\sqrt{a^2+a+1}-\sqrt{a^2-a+1}$
111432
Square root of a number squared is equal to the absolute value of that number
41312
Question on primitive roots of unity
120743
For Riemann sums involving square roots, why do we let $c_{i} = \frac{i^{2}}{ n^{2}}$?
43453
Is ${\sqrt2^{\sqrt2^{\sqrt2^{\sqrt2^\sqrt2}}}}^{...}=4$ correct?
5526
Prove that $ℤ[i]^*= \{1,-1,i,-i\}$
122181
Application of Complex Numbers
90933
Finding the roots of complex numbers
121052
Where is the mistake? $-1=(-1)^{2/2}=\left(\left (-1\right)\displaystyle ^2\right)^{1/2}=1^{1/2}=\sqrt 1=1$
3955
Square roots -- positive and negative