表达式6: left parenthesis, "f" left parenthesis, "t" , right parenthesis left parenthesis, cos 4 "t" , right parenthesis plus 2 "a" , "f" left parenthesis, "t" , right parenthesis left parenthesis, sin 4 "t" , right parenthesis minus 6 , right parenthesisftcos4t+2a,ftsin4t−6
定义域t最小值： negative pi−π
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： piπ
6
表达式7: left parenthesis, "f" left parenthesis, "t" , right parenthesis left parenthesis, cos 5 "t" , right parenthesis plus 2 "a" , "f" left parenthesis, "t" , right parenthesis left parenthesis, sin 5 "t" , right parenthesis minus 8 , right parenthesisftcos5t+2a,ftsin5t−8
定义域t最小值： negative pi−π
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： piπ
7
表达式8: left parenthesis, "f" left parenthesis, "t" , right parenthesis left parenthesis, cos 6 "t" , right parenthesis plus 2 "a" , "f" left parenthesis, "t" , right parenthesis left parenthesis, sin 6 "t" , right parenthesis minus 10 , right parenthesisftcos6t+2a,ftsin6t−10
定义域t最小值： negative pi−π
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： piπ
8
表达式9: left parenthesis, "f" left parenthesis, "t" , right parenthesis left parenthesis, cos 7 "t" , right parenthesis plus 2 "a" , "f" left parenthesis, "t" , right parenthesis left parenthesis, sin 7 "t" , right parenthesis minus 12 , right parenthesisftcos7t+2a,ftsin7t−12
定义域t最小值： negative pi−π
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： piπ
9
表达式10: left parenthesis, "f" left parenthesis, "t" , right parenthesis left parenthesis, cos 8 "t" , right parenthesis plus 2 "a" , "f" left parenthesis, "t" , right parenthesis left parenthesis, sin 8 "t" , right parenthesis minus 14 , right parenthesisftcos8t+2a,ftsin8t−14
定义域t最小值： negative pi−π
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： piπ
10
表达式11: left parenthesis, "f" left parenthesis, "t" , right parenthesis left parenthesis, cos 9 "t" , right parenthesis plus 2 "a" , "f" left parenthesis, "t" , right parenthesis left parenthesis, sin 9 "t" , right parenthesis minus 16 , right parenthesisftcos9t+2a,ftsin9t−16
定义域t最小值： negative pi−π
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： piπ
11
表达式12: left parenthesis, "f" left parenthesis, "t" , right parenthesis left parenthesis, cos 10 "t" , right parenthesis plus 2 "a" , "f" left parenthesis, "t" , right parenthesis left parenthesis, sin 10 "t" , right parenthesis minus 18 , right parenthesisftcos10t+2a,ftsin10t−18
定义域t最小值： negative pi−π
less than or equal to "t" less than or equal to≤t≤
