23 Test file number 92

  23.1 Problem number 107
  23.2 Problem number 108
  23.3 Problem number 109
  23.4 Problem number 110
  23.5 Problem number 113

Test folder name:

test_cases/4_Trig_functions/4.2_Cosine/92_4.2.3.1-a+b_cos-^m-c+d_cos-^n-A+B_cos-