How to derive identities
52557
Derivation of binomial coefficient in binomial theorem.
48394
Proving bessel identity $[J_0(x)]^2 + 2[J_1(x)]^2 + 2[J_2(x)]^2 + \cdots = 1$ and $|J_0(x)|\le 1$
83359
Complex number identity by trigonometry
114411
Simple Proof of the Euler Identity $\exp{i\theta}=\cos{\theta}+i\sin{\theta}$
20346
'Algebraic' way to prove the boolean identity $a + \overline{a}*b = a + b$
12280
A dilogarithm identity?
122481
proof of an identity for exponential function
28374
calculus expressions
141496
Could someone make the proof into a hinted exercise?
109312
How is the matrix identity $\det\begin{pmatrix}A&B\\B&A\end{pmatrix}=\det(A+B)\det(A-B)$ proved?
76347
Shorter proof for some equvalences
18158
Inductive Proof for Vandermonde's Identity?
104977
How to calculate equivalence relations
125174
Combinatorial intuition of identity
19018
Proving Pascal's identity
101320
How to tell $i$ from $-i$?
88489
Derivation of the polarization identities?