運算式 4: left parenthesis, negative "t" sin left parenthesis, "a" , right parenthesis , negative "t" cos left parenthesis, "a" , right parenthesis , right parenthesis−tsina,−tcosa
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： 1010
4
運算式 5: left parenthesis, "t" cos left parenthesis, "a" , right parenthesis , "t" sin left parenthesis, "a" , right parenthesis , right parenthesistcosa,tsina
00
定義域 t 最小值：
less than or equal to "t" less than or equal to≤t≤
