class_docstr: Computes the cosine of a number.
  
  Examples:
      >>> cos = Cosine()
      >>> cos([0.0, np.pi/2.0, np.pi]).tolist()
      [1.0, 6.123233995736766e-17, -1.0]
code: def get_function(self):
      return np.cos
  
file_path: featuretools/featuretools/primitives/standard/transform/numeric/cosine.py
imports: import numpy
  from woodwork.column_schema import ColumnSchema
  from woodwork.logical_types import Double
  from featuretools.primitives.base import TransformPrimitive
  from featuretools.utils.gen_utils import Library
label_desc: Use image node_id 1 for calling the Cosine obj's underlying member method code with example usage: obj.get_function() and returns: np