Question

函数f(x)=Asin(wx+@)-1(A>0,w>0|@|

Answer 1

f(x)max=2,A>0,sin(wx+@)|max=1所以A=3,

相邻两个对称中心之间距离为π/2,为半个周期,所以周期为π,2π/w=π,w=2

f(x)=3sin(2x+@)-1

f(-π/12)=3sin(-π/6+@)-1 =1/2

sin(-π/6+@)=1/2 |@|