f(x)=sin(2x+a),|a|＞π/2,图像经过点p(π/6,1)
所以sin(π/3+a)=1
所以a=π/6
f(x)=sin(2x+π/6)
最小正周期T=2π/2=π
f(π/4)=sin(π/2+a)=cosa=√3/2f派/4的地方能详细点么f(π/4)=sin(2*π/4+π/6)=sin(π/2+π/6)=cosπ/6=√3/2