(1)函数y=sin(x+π/4),x∈(-π/2,π/2)的值域是 (2)函数y=1/2sin(π/4-2π/3)的单调区间是(3)已知f(x)=sin(x+θ)+根号3cos(x-θ)为偶函数,则θ=

问题描述:

(1)函数y=sin(x+π/4),x∈(-π/2,π/2)的值域是 (2)函数y=1/2sin(π/4-2π/3)的单调区间是
(3)已知f(x)=sin(x+θ)+根号3cos(x-θ)为偶函数,则θ=

(1)因为x∈(-π/2,π/2),则x+π/4∈(-π/4,3π/4)所以由正弦函数的单调性可知:函数y=sin(x+π/4),x∈(-π/2,π/2)的值域是 ( -√2/2,1 ](2)函数y=1/2sin(π/4-2π/3)应该是 函数y=1/2sin(x/4-2π/3) 吧!当x/4-...