question: All the sloping edges of the square pyramid are 12 cm long. The CN edge and DN edge have the equal length.
  Find Y, the size of \angle PNM, correct to two decimal places.
query_wo: Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
  Question: All the sloping edges of the square pyramid are 12 cm long. The CN edge and DN edge have the equal length.
  Find Y, the size of \angle PNM, correct to two decimal places.
query_cot: Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
  Question: All the sloping edges of the square pyramid are 12 cm long. The CN edge and DN edge have the equal length.
  Find Y, the size of \angle PNM, correct to two decimal places.
question_for_eval: All the sloping edges of the square pyramid are 12 cm long. The CN edge and DN edge have the equal length.
  Find Y, the size of \angle PNM, correct to two decimal places.