diff --git a/题库0.3/Problems.json b/题库0.3/Problems.json index 9272df99..f096586a 100644 --- a/题库0.3/Problems.json +++ b/题库0.3/Problems.json @@ -585905,7 +585905,9 @@ "20230209\t王伟叶" ], "same": [], - "related": [], + "related": [ + "024564" + ], "remark": "", "space": "4em", "unrelated": [] @@ -665590,6 +665592,31 @@ "space": "", "unrelated": [] }, + "024564": { + "id": "024564", + "content": "已知$\\sin \\alpha=\\dfrac{3}{5}$, $\\tan (\\pi-\\beta)=\\dfrac{1}{2}$, 若$\\cos(\\alpha-2\\beta)\\ne 0$, 求$\\tan (\\alpha-2 \\beta)$的值.", + "objs": [], + "tags": [ + "第三单元" + ], + "genre": "4em", + "ans": "$\\dfrac{7}{24}$", + "solution": "", + "duration": -1, + "usages": [], + "origin": "2025届高一下校本作业-20240207修改", + "edit": [ + "20230209\t王伟叶", + "20240207\t王伟叶" + ], + "same": [], + "related": [ + "021586" + ], + "remark": "", + "space": "4em", + "unrelated": [] + }, "030001": { "id": "030001", "content": "若$x,y,z$都是实数, 则:(填写``\\textcircled{1} 充分非必要、\\textcircled{2} 必要非充分、\\textcircled{3} 充要、\\textcircled{4} 既非充分又非必要''之一)\\\\\n(1) ``$xy=0$''是``$x=0$''的\\blank{50}条件;\\\\\n(2) ``$x\\cdot y=y\\cdot z$''是``$x=z$''的\\blank{50}条件;\\\\\n(3) ``$\\dfrac xy=\\dfrac yz$''是``$xz=y^2$''的\\blank{50}条件;\\\\\n(4) ``$|x |>| y|$''是``$x>y>0$''的\\blank{50}条件;\\\\\n(5) ``$x^2>4$''是``$x>2$'' 的\\blank{50}条件;\\\\\n(6) ``$x=-3$''是``$x^2+x-6=0$'' 的\\blank{50}条件;\\\\\n(7) ``$|x+y|<2$''是``$|x|<1$且$|y|<1$'' 的\\blank{50}条件;\\\\\n(8) ``$|x|<3$''是``$x^2<9$'' 的\\blank{50}条件;\\\\\n(9) ``$x^2+y^2>0$''是``$x\\ne 0$'' 的\\blank{50}条件;\\\\\n(10) ``$\\dfrac{x^2+x+1}{3x+2}<0$''是``$3x+2<0$'' 的\\blank{50}条件;\\\\\n(11) ``$0