=sin22x+2sin2xcos2x+cos22x-(1-cos4x)
=1+sin4x-1+cos4x=sin4x+cos4x=
2 |
π |
4 |
∴函數(shù)f(x)的最小正周期為
2π |
4 |
π |
2 |
(Ⅱ)依題意,y=g(x)=
2 |
π |
8 |
π |
4 |
2 |
π |
4 |
∵0≤x≤
π |
4 |
π |
4 |
π |
4 |
3π |
4 |
當4x-
π |
4 |
π |
2 |
3π |
16 |
2 |
當4x-
π |
4 |
π |
4 |
π |
8 |
π |
4 |
2 |
π |
4 |
2π |
4 |
π |
2 |
2 |
π |
8 |
π |
4 |
2 |
π |
4 |
π |
4 |
π |
4 |
π |
4 |
3π |
4 |
π |
4 |
π |
2 |
3π |
16 |
2 |
π |
4 |
π |
4 |