表达式3: "g" left parenthesis, "t" , right parenthesis equals "a" 13cosine left parenthesis, "t" , right parenthesis minus "a" 5cosine left parenthesis, 2 "t" , right parenthesis minus "a" 2cosine left parenthesis, 3 "t" , right parenthesis minus "a" cosine left parenthesis, 4 "t" , right parenthesis plus "k" left parenthesis, "t" , right parenthesisgt=a13cost−a5cos2t−a2cos3t−acos4t+kt
3
表达式4: "j" left parenthesis, "t" , right parenthesis equals 40floor left parenthesis, mod left parenthesis, StartFraction, "t" Over 40 , EndFraction , 11 , right parenthesis , right parenthesis minus left parenthesis, 40 times 5 , right parenthesisjt=40floormodt40,11−40·5
4
表达式5: "k" left parenthesis, "t" , right parenthesis equals 40floor left parenthesis, StartFraction, "t" Over 40 times 11 , EndFraction , right parenthesis minus left parenthesis, 40 times 5 , right parenthesiskt=40floort40·11−40·5
