名校
解题方法
1 . 已知
三个内角A,B,C的对边分别是a,b,c,若
,则下列选项正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0eec95345f689044992c7fc7dc0eca.png)
A.![]() ![]() |
B.若D是AC边上的一点,且![]() ![]() ![]() ![]() |
C.若三角形是锐角三角形,则![]() ![]() |
D.若三角形是锐角三角形,BD平分![]() ![]() ![]() ![]() |
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名校
解题方法
2 . 已知在
中,内角
所对的边分别为
,点
是
的重心,且
,则角
的大小为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681281acc354a356270214007bcb54f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2024-05-29更新
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814次组卷
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3卷引用:河北省保定市曲阳县第一高级中学2023-2024学年高一下学期5月月考数学试卷
3 . 如图,
是圆柱的底面直径且
,
是圆柱的母线且
,点C是圆柱底面圆周
上靠近点A的三等分点,点E在线段
上.
(2)求三棱锥
的体积;
(3)若D是
的中点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7fa3aea72ccc36948a4a90f7368f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57eea197b445137a2d7b7a95bc699b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d48472bc83fbd59fcab3ac4d3db8ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2aaed1e9ead175f30f7130569d0411.png)
(3)若D是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a321d4261dc571b307f24c6fa5d7ed3d.png)
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2024-05-28更新
|
952次组卷
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4卷引用:河北省邢台市第一中学2023-2024学年高一下学期5月期中测试数学试题
河北省邢台市第一中学2023-2024学年高一下学期5月期中测试数学试题河北省石家庄鹿泉一中2023-2024学年高一下学期期中数学试题河北省石家庄二十二中2023-2024学年高一下学期期中数学试题(已下线)6.6简单几何体的再认识-【帮课堂】(北师大版2019必修第二册)
名校
解题方法
4 . 三棱锥
中,
平面
,
.若该三棱锥的最长的棱长为9,最短的棱长为3,则该三棱锥的最大体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
A.![]() | B.![]() | C.18 | D.36 |
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2024-05-27更新
|
896次组卷
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3卷引用:河北省沧州市泊头市第一中学2023-2024学年高一下学期5月月考数学试题
名校
5 . 已知复数
的实部与虚部的和为
.
(1)若
,且
,求复数
的虚部;
(2)当
取得最小值时,且
在第四象限,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93029cca0ade2b7bd354f7bdb014b5c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0aaf3077f789265703afda6be5e019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b438e4fa9e78123cff54ac20fc136af5.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eebe77bf4e39c3d7b1dc31c441afcc1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2024-05-25更新
|
369次组卷
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3卷引用:河北省邢台市第一中学2023-2024学年高一下学期5月期中测试数学试题
名校
6 . 已知
为BC的中点,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e7e6ba35e6fb0b04f2c08853ff12dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7385a7caee96f0030f1760f70e1150e4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-05-25更新
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344次组卷
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3卷引用:河北省邢台市第一中学2023-2024学年高一下学期5月期中测试数学试题
名校
解题方法
7 . 在
中,角A,B,C所对的边分别为a,b,c,向量
,
,且
.
(1)求角A的大小;
(2)已知
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ade00b2833800e79475db21c82405d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84dc933d61c3666c467905a32cfb52e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2558ead24d56fb372fef95c10fddd3fb.png)
(1)求角A的大小;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41e6e7a547edddcaf55401bfa2de6fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50405194a09def425d582bba828ba94d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31048694d95bd83a31c7b7825410e0de.png)
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2024-05-23更新
|
732次组卷
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2卷引用:河北省保定市曲阳县第一高级中学2023-2024学年高一下学期5月月考数学试卷
名校
解题方法
8 . 设△ABC的内角A,B,C所对的边分别为a,b,c,则下列结论正确的是( )
A.若![]() ![]() |
B.若![]() |
C.若![]() ![]() ![]() |
D.若![]() |
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2024-05-23更新
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883次组卷
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2卷引用:河北省保定市曲阳县第一高级中学2023-2024学年高一下学期5月月考数学试卷
名校
解题方法
9 . 在
中,角
,
,
所对的边分别是
,
,
,已知
,
.
(1)求
;
(2)作角
的平分线,交边
于点
,若
,求
的长度;
(3)在(2)的条件下,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/819c7a62f0c3f64f53370d19db912c13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d09c1c977739b265a62e8706657bbe.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721e29b775e696045f44a4b1e7f74ef2.png)
(2)作角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)在(2)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-05-19更新
|
540次组卷
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2卷引用:河北省邯郸市2023-2024学年高一下学期4月期中联考数学试题
名校
解题方法
10 .
的内角
,
,
的对边分别为
,
,
,
.
(1)求角
的大小;
(2)若
,
的面积为
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf7d9b37196f22db3b376bf13788580.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850e2bc625eca71b12044de26db2fa3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-05-16更新
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