表达式2: 201.5cosine left parenthesis, StartFraction, 2 pi Over 365 , EndFraction left parenthesis, "x" minus 172 , right parenthesis , right parenthesis plus 731.5201.5cos2π365x−172+731.5
2
表达式3: 201.5sine left parenthesis, StartFraction, 2 pi Over 365 , EndFraction left parenthesis, "x" minus 80 , right parenthesis , right parenthesis plus 732201.5sin2π365x−80+732