表达式5: "C" left parenthesis, "t" , right parenthesis equals StartFraction, 1 Over "a" "d" negative "b" "c" , EndFraction left parenthesis, negative 2 "b" "d" sin "t" negative left parenthesis, "b" "c" plus "a" "d" , right parenthesis cos "t" , 2 "a" "c" cos "t" positive left parenthesis, "b" "c" positive "a" "d" , right parenthesis sin "t" , right parenthesisCt=1ad−bc−2bdsint−bc+adcost,2accost+bc+adsint
5
表达式6: "C" left parenthesis, "t" , right parenthesis positive left parenthesis, cos left parenthesis, "t" , right parenthesis , sin left parenthesis, "t" , right parenthesis , right parenthesisCt+cost,sint
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 2 pi2π
6
表达式7: "C" left parenthesis, "t" , right parenthesis negative left parenthesis, cos left parenthesis, "t" , right parenthesis , sin left parenthesis, "t" , right parenthesis , right parenthesisCt−cost,sint
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 2 pi2π
7
表达式8: "C" left parenthesis, "t" , right parenthesisCt
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 2 pi2π
8
表达式9: "C" left parenthesis, "s" , right parenthesis positive left parenthesis, cos left parenthesis, "s" , right parenthesis , sin left parenthesis, "s" , right parenthesis , right parenthesis "t"Cs+coss,sinst
定义域t最小值： negative 1−1
less than or equal to "t" less than or equal to≤t≤
