已知函数f（x）=sinπ/ 2x,则f（1）+.+f（2012)+f(2013)_数学解答

已知函数f（x）=sinπ/ 2x,则f（1）+.+f（2012)+f(2013)

人气：481 ℃　时间：2020-02-05 11:24:37

解答

当x=4kπ+1时,π/2x=2kπ+π/2 sinπ/2x=cos(2kπ+π/2)=1 当x=4kπ+2时,π/2x=2kπ+π sinπ/2x=cos(2kπ+π)=0当x=4kπ+3时,π/2x=2kπ+3π/2 sinπ/2x=cos(2kπ+3π/2)=-1当x=4kπ+4时,π/2x=2kπ+2π sinπ/2x=c...