8.设cos2014°=m,则sin2014°=( )
| A. | $\sqrt{1-{m}^{2}}$ | B. | -$\sqrt{{m}^{2}-1}$ | C. | $±\sqrt{1-{m}^{2}}$ | D. | -$\sqrt{1-{m}^{2}}$ |
20.已知函数f(x)=asin(πx+θ)+bcos(πx+θ)+x,且f(2006)=2005,则f(2007)的值为( )
0 227847 227855 227861 227865 227871 227873 227877 227883 227885 227891 227897 227901 227903 227907 227913 227915 227921 227925 227927 227931 227933 227937 227939 227941 227942 227943 227945 227946 227947 227949 227951 227955 227957 227961 227963 227967 227973 227975 227981 227985 227987 227991 227997 228003 228005 228011 228015 228017 228023 228027 228033 228041 266669
| A. | 2005 | B. | 2006 | C. | 2007 | D. | 2008 |