求函数f(x)=√3sin(2x-π/6)+2平方sin(x-π/12)的最小正周期及取得最大值x的集合?
求函数f(x)=√3sin(2x-π/6)+2平方sin(x-π/12)的最小正周期及取得最大值x的集合?
日期:2011-04-05 08:23:48 人气:1
f(x)=√3sin(2x-π/6)+2平方sin(x-π/12)
=√3sin(2x-π/6)+1-cos(2x-π/6)
=2(√3/2sin(2x-π/6)-1/2cos(2x-π/6))+1
=2(sin(2x-π/6)cosπ/6-cos(2x-π/6)sinπ/6)+1
=2sin(2x-π/6-π/6)+1
=2sin(2x-π/3)+1
所以最小正周期T=2π/2=π
当sin(2x-π/3)=