1 |
2 |
π |
3 |
| ||
2 |
π |
3 |
=2sin(x-
π |
3 |
π |
3 |
∴f(x)在[0,2π]上的单调递增区间是:[0,
π |
2 |
3π |
2 |
(2)由(1)得,g(x)=2sinx(1+sinx)=2sinx+2sin2x
设t=sinx,则t∈[-1,1],
∴h(t)=2t2+2t=2(t+
1 |
2 |
1 |
2 |
当t=−
1 |
2 |
1 |
2 |
当t=1时,函数取到最大值是:4,
则g(x)的值域是[−
1 |
2 |
π |
3 |
3 |
π |
3 |
1 |
2 |
π |
3 |
| ||
2 |
π |
3 |
π |
3 |
π |
3 |
π |
2 |
3π |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |