作业帮sin[2x+（π/6）]=1/2的解集为?答案是x=kπ+π/12 ∪ x=kπ-3π/4 k∈Z 若PA⊥平面ABCD,ABCD为菱形,再议四棱锥P-ABCD的任意两个顶点为断电的所有线段中,随机选取两条,则所取得的两条线段恰为互为异面垂
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![sin[2x+（π/6）]=1/2的解集为?答案是x=kπ+π/12 ∪ x=kπ-3π/4 k∈Z 若PA⊥平面ABCD,ABCD为菱形,再议四棱锥P-ABCD的任意两个顶点为断电的所有线段中,随机选取两条,则所取得的两条线段恰为互为异面垂](/uploads/image/z/13913288-8-8.jpg?t=sin%5B2x%2B%EF%BC%88%CF%80%2F6%EF%BC%89%5D%3D1%2F2%E7%9A%84%E8%A7%A3%E9%9B%86%E4%B8%BA%3F%E7%AD%94%E6%A1%88%E6%98%AFx%3Dk%CF%80%2B%CF%80%2F12+%E2%88%AA+x%3Dk%CF%80-3%CF%80%2F4+k%E2%88%88Z+%E8%8B%A5PA%E2%8A%A5%E5%B9%B3%E9%9D%A2ABCD%2CABCD%E4%B8%BA%E8%8F%B1%E5%BD%A2%2C%E5%86%8D%E8%AE%AE%E5%9B%9B%E6%A3%B1%E9%94%A5P-ABCD%E7%9A%84%E4%BB%BB%E6%84%8F%E4%B8%A4%E4%B8%AA%E9%A1%B6%E7%82%B9%E4%B8%BA%E6%96%AD%E7%94%B5%E7%9A%84%E6%89%80%E6%9C%89%E7%BA%BF%E6%AE%B5%E4%B8%AD%2C%E9%9A%8F%E6%9C%BA%E9%80%89%E5%8F%96%E4%B8%A4%E6%9D%A1%2C%E5%88%99%E6%89%80%E5%8F%96%E5%BE%97%E7%9A%84%E4%B8%A4%E6%9D%A1%E7%BA%BF%E6%AE%B5%E6%81%B0%E4%B8%BA%E4%BA%92%E4%B8%BA%E5%BC%82%E9%9D%A2%E5%9E%82)
sin[2x+（π/6）]=1/2的解集为?答案是x=kπ+π/12 ∪ x=kπ-3π/4 k∈Z 若PA⊥平面ABCD,ABCD为菱形,再议四棱锥P-ABCD的任意两个顶点为断电的所有线段中,随机选取两条,则所取得的两条线段恰为互为异面垂
sin[2x+（π/6）]=1/2的解集为?
答案是x=kπ+π/12 ∪ x=kπ-3π/4 k∈Z
若PA⊥平面ABCD,ABCD为菱形,再议四棱锥P-ABCD的任意两个顶点为断电的所有线段中,随机选取两条,则所取得的两条线段恰为互为异面垂直的线段的概率为?
sin[2x+（π/6）]=1/2的解集为?答案是x=kπ+π/12 ∪ x=kπ-3π/4 k∈Z 若PA⊥平面ABCD,ABCD为菱形,再议四棱锥P-ABCD的任意两个顶点为断电的所有线段中,随机选取两条,则所取得的两条线段恰为互为异面垂
2x+π/6=2kπ+π/6 或 2x+π/6=2kπ+5π/6
x=kπ k∈Z x=kπ+π/3
答案错了吧.