acos:
    description: |
        Computes arccosine of input tensors element-wise.

        .. math::

            out_i = \cos^{-1}(input_i)

        Args:
            input (Tensor): The shape of tensor is
                :math:`(N,*)` where :math:`*` means, any number of additional dimensions.

        Returns:
            Tensor, has the same shape and dtype as `input`.

        Raises:
            TypeError: If `input` is not a Tensor.
            TypeError: If dtype of `input` is not float16, float32 or float64, complex64, complex128.

        Supported Platforms:
            ``Ascend`` ``GPU`` ``CPU``

        Examples:
            >>> import mindspore
            >>> import numpy as np
            >>> from mindspore import Tensor, ops
            >>> input = Tensor(np.array([0.74, 0.04, 0.30, 0.56]), mindspore.float32)
            >>> output = ops.acos(input)
            >>> print(output)
            [0.737726  1.5307857 1.2661036 0.9764105]