---
title: "ClikaRT::ops::acos_"
sidebar_label: "acos_"
description: "In-place acos: writes the result through self; same formula, arguments, and error conditions as acos(). A view input writes through its base storage."
---

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<span class="api-kind api-kind--function">function</span>

## acos\_() {#acos_}

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[`Tensor`](../Tensor.md)`&` **`acos_`**([`Tensor`](../Tensor.md)`&` `self`)

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In-place [`acos`](./acos.md#acos): writes the result through `self`; same formula, arguments, and error conditions as [`acos()`](./acos.md#acos). A view input writes through its base storage. Returns `self` under the value surface, [`Result`](../Result.md)`<void>` under the [`Result`](../Result.md) surface; [`CLIKART_CHECK`](../../index.md#CLIKART_CHECK) is the mode-stable spelling.

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Declared in `ClikaRT/compute/ops.h`, line 4811

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