表达式6: left parenthesis, "r" Subscript, 2 , Baseline cos left parenthesis, "t" , right parenthesis , "r" Subscript, 2 , Baseline sin left parenthesis, "t" , right parenthesis , right parenthesisr2cost,r2sint
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: left parenthesis, left parenthesis, "r" Subscript, 1 , Baseline minus "r" Subscript, 2 , Baseline , right parenthesis cos left parenthesis, "t" , right parenthesis plus "r" Subscript, 2 , Baseline cos left parenthesis, "a" Subscript, 1 , Baseline , right parenthesis , left parenthesis, "r" Subscript, 1 , Baseline minus "r" Subscript, 2 , Baseline , right parenthesis sin left parenthesis, "t" , right parenthesis plus "r" Subscript, 2 , Baseline sin left parenthesis, "a" Subscript, 1 , Baseline , right parenthesis , right parenthesisr1−r2cost+r2cosa1,r1−r2sint+r2sina1
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
隐藏 标签 left parenthesis, "r" Subscript, 2 , Baseline cos left parenthesis, "a" Subscript, 1 , Baseline , right parenthesis , "r" Subscript, 2 , Baseline sin left parenthesis, "a" Subscript, 1 , Baseline , right parenthesis , right parenthesisr2cosa1,r2sina1
隐藏 标签 left parenthesis, "r" Subscript, 3 , Baseline cos left parenthesis, negative StartFraction, "r" Subscript, 1 , Baseline Over "r" Subscript, 1 , Baseline minus "r" Subscript, 2 , Baseline , EndFraction "a" Subscript, 1 , Baseline , right parenthesis plus "r" Subscript, 2 , Baseline cos left parenthesis, "a" Subscript, 1 , Baseline , right parenthesis , "r" Subscript, 3 , Baseline sin left parenthesis, negative StartFraction, "r" Subscript, 1 , Baseline Over "r" Subscript, 1 , Baseline minus "r" Subscript, 2 , Baseline , EndFraction "a" Subscript, 1 , Baseline , right parenthesis plus "r" Subscript, 2 , Baseline sin left parenthesis, "a" Subscript, 1 , Baseline , right parenthesis , right parenthesisr3cos−r1r1−r2a1+r2cosa1,r3sin−r1r1−r2a1+r2sina1
表达式10: left parenthesis, "r" Subscript, 3 , Baseline cos left parenthesis, negative StartFraction, "r" Subscript, 1 , Baseline Over "r" Subscript, 1 , Baseline minus "r" Subscript, 2 , Baseline , EndFraction "t" , right parenthesis plus "r" Subscript, 2 , Baseline cos left parenthesis, "t" , right parenthesis , "r" Subscript, 3 , Baseline sin left parenthesis, negative StartFraction, "r" Subscript, 1 , Baseline Over "r" Subscript, 1 , Baseline minus "r" Subscript, 2 , Baseline , EndFraction "t" , right parenthesis plus "r" Subscript, 2 , Baseline sin left parenthesis, "t" , right parenthesis , right parenthesisr3cos−r1r1−r2t+r2cost,r3sin−r1r1−r2t+r2sint
00
定义域t最小值：
less than or equal to "t" less than or equal to≤t≤
