code: def setUp(self):
      self.check_forward_options.update({"atol": 1e-7, "rtol": 1e-7})
      if self.dtype == numpy.float16:
          self.check_backward_options.update(
              {"atol": 1e-3, "rtol": 1e-2}
          )
          self.check_double_backward_options.update(
              {"atol": 1e-3, "rtol": 1e-2}
          )
      else:
          self.check_backward_options.update(
              {"atol": 1e-4, "rtol": 1e-3}
          )
          self.check_double_backward_options.update(
              {"atol": 1e-4, "rtol": 1e-3}
          )
  
file_path: chainer/tests/chainer_tests/functions_tests/math_tests/test_hyperbolic.py
imports: import numpy
  from chainer import functions
  from chainer import testing
  from chainer.utils import force_array
label_desc: Use image node_id 1 for calling the TestCoshSinh obj's underlying member method code with example usage: obj.setUp() without return types