(l-onnx-doc-Acos)=

# Acos


(l-onnx-op-acos-22)=

## Acos - 22

### Version

- **name**: [Acos (GitHub)](https://github.com/onnx/onnx/blob/main/docs/Operators.md#Acos)
- **domain**: `main`
- **since_version**: `22`
- **function**: `False`
- **support_level**: `SupportType.COMMON`
- **shape inference**: `True`

This version of the operator has been available
**since version 22**.

### Summary

Calculates the arccosine (inverse of cosine) of the given input tensor, element-wise.

### Inputs

- **input** (heterogeneous) - **T**:

  Input tensor

### Outputs

- **output** (heterogeneous) - **T**:

  The arccosine of the input tensor computed element-wise

### Type Constraints

* **T** in ( `tensor(bfloat16)`, `tensor(double)`, `tensor(float)`, `tensor(float16)` ):

  Constrain input and output types to float tensors.

```{toctree}
text_diff_Acos_7_22
```

(l-onnx-op-acos-7)=

## Acos - 7

### Version

- **name**: [Acos (GitHub)](https://github.com/onnx/onnx/blob/main/docs/Operators.md#Acos)
- **domain**: `main`
- **since_version**: `7`
- **function**: `False`
- **support_level**: `SupportType.COMMON`
- **shape inference**: `True`

This version of the operator has been available
**since version 7**.

### Summary

Calculates the arccosine (inverse of cosine) of the given input tensor, element-wise.

### Inputs

- **input** (heterogeneous) - **T**:

  Input tensor

### Outputs

- **output** (heterogeneous) - **T**:

  The arccosine of the input tensor computed element-wise

### Type Constraints

* **T** in ( `tensor(double)`, `tensor(float)`, `tensor(float16)` ):

  Constrain input and output types to float tensors.