Expression 6: "f" left parenthesis, "a" , right parenthesis equals "r" Subscript, "a" "d" "i" "u" "s" , Baseline times left parenthesis, cos left parenthesis, StartFraction, 2 pi Over "n" , EndFraction "a" , right parenthesis , sin left parenthesis, StartFraction, 2 pi Over "n" , EndFraction "a" , right parenthesis , right parenthesisfa=radius·cos2πna,sin2πna
6
Expression 7: "l" Subscript, 1 , Baseline plus left parenthesis, "l" Subscript, 2 , Baseline minus "l" Subscript, 1 , Baseline , right parenthesis "t"l1+l2−l1t
00
domain t Minimum:
less than or equal to "t" less than or equal to≤t≤