運算式 2: left parenthesis, cos left parenthesis, "t" , right parenthesis , sin left parenthesis, "t" , right parenthesis , right parenthesiscost,sint
00
定義域 t 最小值：
less than or equal to "t" less than or equal to≤t≤
定義域 t 最大值： 2 pi2π
2
運算式 3: StartFraction, sin left parenthesis, 10 "t" , right parenthesis plus 4 Over 4 , EndFraction left parenthesis, cos left parenthesis, "t" , right parenthesis , sin left parenthesis, "t" , right parenthesis , right parenthesissin10t+44cost,sint
00
定義域 t 最小值：
less than or equal to "t" less than or equal to≤t≤
