.. acos.rst: #### Acos #### .. code-block:: cpp Acos // Elementwise acos operation Description =========== Produces a tensor of the same element type and shape as ``arg,`` where the value at each coordinate of ``output`` is the inverse cosine of the value at the corresponding coordinate of ``arg.`` Inputs ------ +-----------------+-------------------------+--------------------------------+ | Name | Element Type | Shape | +=================+=========================+================================+ | ``arg`` | Any | Any | +-----------------+-------------------------+--------------------------------+ Outputs ------- +-----------------+-------------------------+--------------------------------+ | Name | Element Type | Shape | +=================+=========================+================================+ | ``output`` | Same as ``arg`` | Same as ``arg`` | +-----------------+-------------------------+--------------------------------+ Mathematical Definition ======================= .. math:: \mathtt{output}_{i_0, \ldots, i_{n-1}} = \cos^{-1}(\mathtt{arg}_{i_0, \ldots, i_{n-1}}) Backprop ======== .. math:: \overline{\mathtt{arg}} \leftarrow -\frac{\Delta}{\sqrt{1-\mathtt{arg}^2}} C++ Interface ============= .. doxygenclass:: ngraph::op::Acos :project: ngraph :members: