f(x)=asin(x+π/4)+bsin(x-π/4) (ab不为0)是偶函数,有序实数对(a,b)可以是?

f(x)=asin(x+π/4)+3sin(x-π/4)是偶函数,求a. f(x)=asin(πx+a)+bcos(πx+b)+4 f(2010)=5 f(2013)= f(x)=asin(πx+a)+bcos(πx+β)+4,且f(1999)=3,求f(2000) 已知函数f(x)=更号2asin(x-π/4)+a+b 当a 已知函数f(x)=Asin 已知函数f(x)=Asin(2x+a),若函数f(x+π/6)为偶函数,且f(π/6)=4,求f(x)解析式 若函数f(x)=(1+cos2x)/[4sin(π/2+x)]-asinπ/2cos(π-x/2) 1.函数f(X)=asin(X+π/4)+3sin(X-π/4)是偶函数,则a= 若f(x)=asin(x+π/4)+3sin(x-π/4)是偶函数,则实数a= 若f(x)=asin(x+π/4)+3sin(x-π/4)是偶函数,求a 已知函数f（x）=Asin（2x+φ）,当x=-π/3时,最小值为-4, 已知函数f(x)=asin(πx+α)+bcos(πx+β)+4,x∈R,且f(2011)=3,则求f(2012)的值 asin(θ+α)+bsin(θ+β)=?化简f(x)=asin(πx+α)+bcos(πx+β)且f(2009)=3,则f(2010)=? 已知函数 f(x)=Asin(π/3x+b),x∈R,A>0,0 f(x)=Asin(x+φ)最大值为1,0 已知函数f(x)=Asin(x+&)(A>0,0 已知函数f[x]=Asin²【ωx+ 已知函数f(x)=Asin(x+q) (0