幻音宝盒做出来了:y= sin2x + acon2x 知道对称轴是 x=x/8 a=
来源:百度文库 编辑:神马品牌网 时间:2024/05/13 08:36:35
y= sin2x + acon2x =sqr(1+a^2)sin(2x+θ)…………(tanθ=a)
它的对称轴方程为2x+θ=kπ+π/2即x=kπ/2+π/4-θ/2=π/8(k为整数)
解得θ=kπ+π/4
又因0<=θ<π
故θ=π/4
a=1
y= sin2x + acon2x =sqr(1+a^2)sin(2x+θ)…………(tanθ=a)
它的对称轴方程为2x+θ=kπ+π/2即x=kπ/2+π/4-θ/2=π/8(k为整数)
解得θ=kπ+π/4
又因0<=θ<π
故θ=π/4
a=1