想要利用vuamp子程序通過定義幅值的方式分別定義路基表面，路基邊坡，天然地表的溫度變化的函數，.log里面提示

VUAMP.for(40): error #5082: Syntax error, found IDENTIFIER 'SIN' when expecting one of: * ) :: , <END-OF-STATEMENT> ; . (/ + - : ] /) ' ** / // > .LT. < ...

      ampValueNew=-1+15sin((2*pi/8760)*tim+pi/2)+2.6*tim/(8760*50)     

-----------------------^

VUAMP.for(49): error #5082: Syntax error, found IDENTIFIER 'SIN' when expecting one of: * ) :: , <END-OF-STATEMENT> ; . (/ + - : ] /) ' ** / // > .LT. < ...

      ampValueNew=-1.8+13sin((2*pi/8760)*tim+pi/2)+2.6*tim/(8760*50)     

-------------------------^

VUAMP.for(58): error #5082: Syntax error, found IDENTIFIER 'SIN' when expecting one of: * ) :: , <END-OF-STATEMENT> ; . (/ + - : ] /) ' ** / // > .LT. < ...

      ampValueNew=-4+12sin((2*pi/8760)*tim+pi/2)+2.6*tim/(8760*50)    

請大家幫忙看一下這是哪出問題了

vuamp.zip