1---
2category: '@Math'
3---
4 
5# useMath
6 
7Reactive `Math` methods.
8 
9## Usage
10 
11```ts
12import { useMath } from '@vueuse/math'
13 
14const base = ref(2)
15const exponent = ref(3)
16const result = useMath('pow', base, exponent) // Ref<8>
17 
18const num = ref(2)
19const root = useMath('sqrt', num) // Ref<1.4142135623730951>
20 
21num.value = 4
22console.log(root.value) // 2
23```
24 
25## Type Declarations
26 
27```ts
28export type UseMathKeys = keyof {
29  [K in keyof Math as Math[K] extends (...args: any) => any
30    ? K
31    : never]: unknown
32}
33export type UseMathReturn<K extends keyof Math> = ReturnType<
34  Reactified<Math[K], true>
35>
36/**
37 * Reactive `Math` methods.
38 *
39 * @see https://vueuse.org/useMath
40 *
41 * @__NO_SIDE_EFFECTS__
42 */
43export declare function useMath<K extends keyof Math>(
44  key: K,
45  ...args: ArgumentsType<Reactified<Math[K], true>>
46): UseMathReturn<K>
47```
48