已知集合A={x|x^2≥1/4}集合B={x|x=(1-cosx)/sinx,-π/2<x<π/2}求A交B

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已知集合A={x|x^2≥1/4}集合B={x|x=(1-cosx)/sinx,-π/2<x<π/2}求A交B已知集合A={x|x^2≥1/4}集合B={x|x=(1-cosx)/sinx,-π/2<

已知集合A={x|x^2≥1/4}集合B={x|x=(1-cosx)/sinx,-π/2<x<π/2}求A交B
已知集合A={x|x^2≥1/4}集合B={x|x=(1-cosx)/sinx,-π/2<x<π/2}求A交B

已知集合A={x|x^2≥1/4}集合B={x|x=(1-cosx)/sinx,-π/2<x<π/2}求A交B
x^2》1/4
x》1/2或x《-1/2
A={x|x》1/2或x《-1/2}
x=[cos(x/2)*cos(x/2)+sin(x/2)*sin(x/2)-cos(x/2)*cos(x/2)+sin(x/2)*sin(x/2)]/[2sin(x/2)cos(x/2)]
=tan(x/2)
-π/4<x/2<π/4
-1

我刚写完1题 也是集合的,脑袋都胀了