code: def expected_trace_distance_rx_pauliz(param):
      """Return the analytical trace distance for the RX and PauliZ."""
      return np.abs(np.sin(param / 2))
  
imports: import pytest
  import pennylane
  from pennylane import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: expected_trace_distance_rx_pauliz(param) and returns: np