x属于(0,派/2),则2sin(x+派/3)的值域是?
问题描述:
x属于(0,派/2),则2sin(x+派/3)的值域是?
答
x+π/3∈(π/3,5π/6)
sin(x+π/3)∈(1/2,1)
2sin(x+π/3)值域为[1,2]