已知f(n)=sin(nπ/6),则f(1)+f(2)+f(3)+…+f(2012)=.
已知f(n)=sin(nπ/6),则f(1)+f(2)+f(3)+…+f(2012)=.
日期:2012-06-29 22:22:56 人气:2
f(1)=sin(π/6)=1/2
f(2)=sin(π/3)=√3/2
f(3)=sin(π/2)=1
f(4)=sin(2π/3)=√3/2
f(5)=sin(5π/6)=1/2
f(6)=sin(π)=0
f(7)=sin(7π/6)=-1/2
f(8)=sin(4π/3)=-√3/2
f(9)=sin(3π/2)=-1
f(10)=sin(5π/3)=-√3