code: def arccos(x, out=None, where=None, **kwargs):
      """
      Trigonometric inverse cosine, element-wise.
  
      The inverse of `cos` so that, if ``y = cos(x)``, then ``x = arccos(y)``.
  
      Parameters
      ----------
      x : array_like
          `x`-coordinate on the unit circle.
          For real arguments, the domain is [-1, 1].
      out : Tensor, None, or tuple of Tensor and None, optional
          A location into which the result is stored. If provided, it must have
          a shape that the inputs broadcast to. If not provided or `None`,
          a freshly-allocated tensor is returned. A tuple (possible only as a
          keyword argument) must have length equal to the number of outputs.
      where : array_like, optional
          Values of True indicate to calculate the ufunc at that position, values
          of False indicate to leave the value in the output alone.
      **kwargs
  
      Returns
      -------
      angle : Tensor
          The angle of the ray intersecting the unit circle at the given
          `x`-coordinate in radians [0, pi]. If `x` is a scalar then a
          scalar is returned, otherwise an array of the same shape as `x`
          is returned.
  
      See Also
      --------
      cos, arctan, arcsin
  
      Notes
      -----
      `arccos` is a multivalued function: for each `x` there are infinitely
      many numbers `z` such that `cos(z) = x`. The convention is to return
      the angle `z` whose real part lies in `[0, pi]`.
  
      For real-valued input data types, `arccos` always returns real output.
      For each value that cannot be expressed as a real number or infinity,
      it yields ``nan`` and sets the `invalid` floating point error flag.
  
      For complex-valued input, `arccos` is a complex analytic function that
      has branch cuts `[-inf, -1]` and `[1, inf]` and is continuous from
      above on the former and from below on the latter.
  
      The inverse `cos` is also known as `acos` or cos^-1.
  
      References
      ----------
      M. Abramowitz and I.A. Stegun, "Handbook of Mathematical Functions",
      10th printing, 1964, pp. 79. http://www.math.sfu.ca/~cbm/aands/
  
      Examples
      --------
      We expect the arccos of 1 to be 0, and of -1 to be pi:
      >>> import mars.tensor as mt
  
      >>> mt.arccos([1, -1]).execute()
      array([ 0.        ,  3.14159265])
  
      Plot arccos:
  
      >>> import matplotlib.pyplot as plt
      >>> x = mt.linspace(-1, 1, num=100)
      >>> plt.plot(x.execute(), mt.arccos(x).execute())
      >>> plt.axis('tight')
      >>> plt.show()
      """
      op = TensorArccos(**kwargs)
      return op(x, out=out, where=where)
  
file_path: mars/mars/tensor/arithmetic/arccos.py
imports: import numpy
  from ...None import opcodes
  from ..utils import infer_dtype
  from .core import TensorUnaryOp
  from .utils import arithmetic_operand
label_desc: Use image node_id 1 for calling a global function with example usage: arccos(x, out, where) and returns: op