表达式6: left parenthesis, "x" Subscript, 1 , Baseline left bracket, 2 , 1 , 3 , right bracket sin left parenthesis, 360 "t" , right parenthesis , "y" Subscript, 1 , Baseline left bracket, 1 "t" "t" Subscript, 1 , Baseline , 2 "t" , 3 "t" , right bracket cos left parenthesis, 360 "t" "t" "t" Subscript, 1 , Baseline , right parenthesis , right parenthesisx12,1,3sin360t,y11tt1,2t,3tcos360ttt1
6
表达式7: left parenthesis, "x" Subscript, 1 , Baseline sin left parenthesis, 360 "t" Subscript, 1 , Baseline , right parenthesis , "y" Subscript, 1 , Baseline cos left parenthesis, 360 "t" Subscript, 1 , Baseline , right parenthesis , right parenthesisx1sin360t1,y1cos360t1
7
表达式8: left parenthesis, "x" Subscript, 1 , Baseline cos left parenthesis, 360 "t" Subscript, 1 , Baseline , right parenthesis , "y" Subscript, 1 , Baseline sin left parenthesis, 360 "t" Subscript, 1 , Baseline , right parenthesis , right parenthesisx1cos360t1,y1sin360t1
8
表达式9: left parenthesis, "x" Subscript, 1 , Baseline cos left parenthesis, 360 "t" Subscript, 1 , Baseline , right parenthesis , "y" Subscript, 1 , Baseline sin left parenthesis, 360 "t" Subscript, 1 , Baseline , right parenthesis , right parenthesisx1cos360t1,y1sin360t1
9
表达式10: "a" equals left bracket, 1...3 0 , right bracketa=1...30
