f(x)=asin(πx+α)+bcos(πx+β)
f(2007)=asin(2007π+α)+bcos(2007π+β)
=asinα+bcosβ
=3
f(2008)=asin(2008π+α)+bcos(2008π+β)
=asin(π+α)+bcos(π+β)
=-asinα-bcosβ
=-(asinα+bcosβ)
=-3
f(x)=asin(πx+α)+bcos(πx+β)
f(2007)=asin(2007π+α)+bcos(2007π+β)
=asinα+bcosβ
=3
f(2008)=asin(2008π+α)+bcos(2008π+β)
=asin(π+α)+bcos(π+β)
=-asinα-bcosβ
=-(asinα+bcosβ)
=-3