1 / 3

数学作业

A 1. D 1. N. C 1. B 1. M. A. D. A. C. 数学作业. 1 、 如图所示，在长方体 ABCD-A 1 B 1 C 1 D 1 中 ,AB=5,AD=8,AA1=4, M 为 B 1 C 1 上一点且 B 1 M=2 ，点 N 在线段 A 1 D 上， A 1 D⊥AN. （ 1 ）求 cos< >; （ 2 ）求直线 AD 与平面 ANM 所成角的余弦值； （ 3 ）求平面 ANM 与平面 ABCD 夹角的余弦值。. O 1. C 1. A 1. B 1. O. D.

kishi
Télécharger la présentation

数学作业

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A1 D1 N C1 B1 M A D A C 数学作业 1、如图所示，在长方体ABCD-A1B1C1D1中,AB=5,AD=8,AA1=4, M为B1C1上一点且B1M=2，点N在线段A1D上，A1D⊥AN. （1）求cos< >; （2）求直线AD与平面ANM所成角的余弦值； （3）求平面ANM与平面ABCD夹角的余弦值。

  2. O1 C1 A1 B1 O D E B A • 2、在长方体OABC-O1A1B1C1中，OA=2，AB=3，AA1=2，E是BC的中点。 • （1）求直线AO1与B1E所成角的余弦值； • （2）作O1D⊥AC于D，求点O与点D的距离。 C

  3. M F E P C Q B A 3、如图所示，已知四边形ABCD、EADM和MDCF都是边长为a的正方形，点P、Q分别是ED和AC的中点，求： （1） 和 所成的角； （2）P点到平面EFB的距离； （3）异面直线PM与FQ的距离。

More Related