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# tf.math.acos

Computes acos of x element-wise.

### Used in the notebooks

Used in the tutorials

Provided an input tensor, the `tf.math.acos` operation returns the inverse cosine of each element of the tensor. If `y = tf.math.cos(x)` then, `x = tf.math.acos(y)`.

Input range is `[-1, 1]` and the output has a range of `[0, pi]`.

#### For example:

````x = tf.constant([1.0, -0.5, 3.4, 0.2, 0.0, -2], dtype = tf.float32)`
`tf.math.acos(x)`
`<tf.Tensor: shape=(6,), dtype=float32,`
`numpy= array([0. , 2.0943952, nan, 1.3694383, 1.5707964, nan],`
`dtype=float32)>`
```

`x` A `Tensor`. Must be one of the following types: `bfloat16`, `half`, `float32`, `float64`, `uint8`, `int8`, `int16`, `int32`, `int64`, `complex64`, `complex128`, `string`.
`name` A name for the operation (optional).

A `Tensor`. Has the same type as x.

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