22 Test file number 89

  22.1 Problem number 128
  22.2 Problem number 129
  22.3 Problem number 130
  22.4 Problem number 144

Test folder name:

test_cases/4_Trig_functions/4.2_Cosine/89_4.2.2.1-a+b_cos-^m-c+d_cos-^n