Factorize $z^5 - 1$ using $\cos$ function
52800
Show that $z^5-1=(z-1)(z^2+2z\cos{\pi \over 5}+1)(z^2-2z\cos{2\pi \over 5}+1)$
74143
Simplifying and evaluating $\cot 70^\circ+4\cos 70^\circ$
20611
Inverse of a factorial
65645
Express $w$ and $\frac1w$ for $w=\frac {\sqrt2+\sqrt3}{\sqrt5-\sqrt3}$ in the simplest form with a rational denominator
37108
Solve $\cos(z)=\frac 34+\frac i4$
155452
Prime factorization of square numbers
38871
How to obtain the complete factorization of $P_n(X)=\frac{(X+i)^{2n+1} - (X-i)^{2n+1}}{2i} = 0$
119109
Integer solutions to $ n^2 + 1 = 2 \times 5^m$
63155
Express $1+2\cos a$ as a product
44878
Factor $x^5+x^2+1$ into irreducible polynomials in $Z[x]$
136077
Prove that $x-1$ is a factor of $x^n-1$
14124
Factor $x^6 +5x^3 +8$
102320
Is my solution correct for solving $\cos(z)=2$, $z\in \mathbb{C}$
60731
Factorization of a map between CW complexes
70981
Galois Group of $x^5+1$
19459
Find remainder of $F_n$ when divided by $5$
144765
Solving $\sqrt{x+5} = x - 1$