46 Can hyperbolic functions be defined in terms of trigonometric functions? 17 I've noticed some relationships with cosine and square root. 11 First 30 solutions of Pell's equation. 10 About primes and cyclotomic extensions 10 Prove $\log(x)$ is transcendental

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### Questions (2)

 21 $A_4$ extension of $\mathbb{Q}$ ramified at one prime 1 Selection without replacement

### Tags (107)

 76 trigonometry × 8 46 hyperbolic-functions 72 abstract-algebra × 26 46 exponential-function 49 field-theory × 22 38 extension-field × 14 49 number-theory × 20 34 elementary-number-theory × 9 47 galois-theory × 22 28 calculus × 9

### Bookmarks (14)

 17 Prove $f(x)=x^8-24 x^6+144 x^4-288 x^2+144$ is irreducible over $\mathbb{Q}$ 14 Geometric construction of hyperbolic trigonometric functions 13 Geometric definitions of hyperbolic functions 11 Show that $\lim\limits_n \frac{a_n}{a_{n+1}} = z_0$ 11 About the limit of the coefficient ratio for a power series over complex numbers