約定%為平方根符號(hào),如2%=根號(hào)2
f(x)=2cos平方x+sin2x+a
f(x)=cos2x+sin2x+a+1
f(x)=2%*（2%/2cos2x+2%/2sin2x）+a+1
f(x)=2%*sin(2x+π/4)+a+1
則2x=π/4時(shí)在【0,π/6】時(shí)f(x)為最大值
即f(π/4)=2
得a=1-2%
求對(duì)稱軸：
令2x+π/4=π/2或2x+π/4=3π/2,又f(x)為周期為π的周期函數(shù)
所以f(x)的對(duì)稱軸方程為
x=π/8+kπ或x=3π/8+kπ
k為整數(shù)
記得加分的說(shuō)……