Выражение 4: left parenthesis, "r" sin left parenthesis, 12 "a" , right parenthesis , "r" cos left parenthesis, 12 "a" , right parenthesis , right parenthesisrsin12a,rcos12a
4
Выражение 5: left parenthesis, "r" sin left parenthesis, 12 "a" plus "t" Subscript, 1 , Baseline , right parenthesis , "r" cos left parenthesis, 12 "a" plus "t" Subscript, 1 , Baseline , right parenthesis , right parenthesisrsin12a+t1,rcos12a+t1
5
Выражение 6: left parenthesis, "r" sin left parenthesis, 12 "a" plus "t" Subscript, 1 , Baseline , right parenthesis , "r" cos left parenthesis, 12 "a" "t" Subscript, 1 , Baseline , right parenthesis , right parenthesisrsin12a+t1,rcos12at1