sema-docs 1.21.2

Canonical structured documentation for Sema builtins/special forms; powers LSP hover/completion and REPL apropos
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12

---
name: "math/acos"
module: "math"
section: "Trigonometry"
---

Inverse cosine. Returns radians.

```sema
(math/acos 0)      ; => ~1.5707 (π/2)
(math/acos 1)      ; => 0.0
```