若f(x)=asin(x+π/4)+3sin(x-π/4)是偶函数,则实数a=

f(x)=asin(x+π/4)+3sin(x-π/4)是偶函数,求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 f(x)=asin(πx+a)+bcos(πx+β)+4,且f(1999)=3,求f(2000) 若函数f(x)=Asin(x+π/4)+3sin(x-π/4)是偶函数,求f(x)的最大值 设函数f(x)=asin(2x+π/3)+b,(1)若a>0,求f(x)单调递增区间；设函数f(x)=asin(2x+π/3)+b,(1)若a>0,求f(x)单调递增区间；（2）x(0,π/4)时,f(x)的值域为（1,3）,求a,b的值 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 asin(θ+α)+bsin(θ+β)=?化简f(x)=asin(πx+α)+bcos(πx+β)且f(2009)=3,则f(2010)=? 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= 已知函数f（x）=Asin（2x+φ）,当x=-π/3时,最小值为-4, 若f(x)=asin(x+TT/4)+3sin(x-TT/4) 是偶函数,则a= 若F(X)=ASIN(X+PI/4)+3SIN(X—PI/4)是偶函数,则A= 已知函数 f(x)=Asin(π/3x+b),x∈R,A>0,0 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 f(x)=asin(πx+α)+bcos(πx+β),若f(2008)=1,求f(2010)? f(x)=asin(πx+a)+bcos(πx+b)+4 f(2010)=5 f(2013)= f(x)=asin(πx+a)+bcos(πx+b),且f(2009)=3,求f(2010)