RT函数f(X)的定义域为[-1/2,√3/2),求f(sinx)的定义域楼下的 = =

问题描述:

RT
函数f(X)的定义域为[-1/2,√3/2),求f(sinx)的定义域
楼下的 = =

∵f(X)的定义域为[-1/2,√3/2)
∴-1/2≤sinx<√3/2
∴x∈[2kπ-π/6,2kπ+π/3)∪(2π/3+2kπ,2kπ+7π/6](k∈Z)
∴f(sinx)的定义域为[2kπ-π/6,2kπ+π/3)∪(2π/3+2kπ,2kπ+7π/6](k∈Z)

∵f(X)的定义域为[-1/2,√3/2)
∴-1/2≤sinx<√3/2
∴kπ+(-1)^(k+1)π/6≤x<kπ+(-1)^kπ/3,(k∈Z)
∴f(sinx)的定义域:
[kπ+(-1)^(k+1)π/6,kπ+(-1)^kπ/3)(k∈Z)

∵f(X)的定义域为[-1/2,√3/2)
∴-1/2≤sinx<√3/2
∴x∈[2kπ-π/2,2kπ+π/3)∪(2π/3+2kπ,2kπ+7π/6](k∈Z)
∴f(sinx)的定义域为[2kπ-π/2,2kπ+π/3)∪(2π/3+2kπ,2kπ+7π/6](k∈Z)
对不?给分哈.嘿嘿