---
title: "acos"
sidebar_label: "acos"
description: "Kotlin binding reference: acos."
---

<!-- Generated by tools/api_reference/generate_api_docs.py. Do not edit. -->

//[clika-runtime](../../../index.md)/[io.clika.runtime](../index.md)/[Ops](index.md)/[acos](acos.md)

# acos

[common]\
fun [acos](acos.md)(input: [Tensor](../Tensor/index.md)): [Tensor](../Tensor/index.md)

`acos(input: Tensor)`: the `acos` operator. Elementwise arccosine. Inputs outside `[-1, 1]` produce NaN. Value-domain violations follow IEEE semantics (NaN / ±inf in the result), never an error.