Premium Only Content
This video is only available to Rumble Premium subscribers. Subscribe to
enjoy exclusive content and ad-free viewing.

Toán 10: Cho hai vectơ a ⃗,b ⃗ thỏa mãn: |a ⃗ |=4,|b ⃗ |=3,a ⃗.b ⃗=10 Xét hai vectơ y ⃗=a ⃗-b ⃗
10 months ago
45
Cho hai vectơ a ⃗,b ⃗ thỏa mãn:
|a ⃗ |=4,|b ⃗ |=3,a ⃗.b ⃗=10
Xét hai vectơ y ⃗=a ⃗-b ⃗
x ⃗=a ⃗-2b ⃗
Gọi α là góc giữa 2 vectơ x ⃗,y ⃗
A.cosα=-2/√15 B.cosα=1/√15
C.cosα=3/√15 B.cosα=2/√15
#HinhHocOxyz
#HinhHocOxy
#Vector
#Vecto
#ToanLop10
#OxyzGeometry
#OxyGeometry
Loading comments...
-
LIVE
Drew Hernandez
10 hours agoTRUMP'S DC TAKEOVER & ISRAEL KILLS AL JAZEERA TEAM AHEAD OF GAZA INVASION
584 watching -
1:19:05
Glenn Greenwald
6 hours agoTrump's DC Takeover: Is it Legal? Israel Kills More Journalists, Including Anas al-Sharif; Glenn Reacts to Pete Buttigieg and JD Vance on Israel | SYSTEM UPDATE #501
129K109 -
44:40
Katie Miller Pod
6 hours ago $4.46 earnedEpisode 1 - Vice President JD Vance | The Katie Miller Podcast
46.9K12 -
13:09:34
LFA TV
1 day agoLFA TV ALL DAY STREAM - MONDAY 8/11/25
224K20 -
1:44:36
RiftTV
8 hours agoBREAKING: Trump FEDERALIZES D.C. To RESTORE Law & Order | The Rift | Ryan Matta, Olivia Krolczyk + Braeden Sorbo
61K16 -
3:00:47
megimu32
6 hours agoOTS: Breakfast Nostalgia + Blind Chocolate Cereal Showdown… LIVE! 🍫🥣
49.5K2 -
3:36:47
LIVE WITH CHRIS'WORLD
13 hours agoLIVE WITH CHRIS’WORLD - It’s Called LAW & ORDER
40.1K6 -
11:07
AlaskanBallistics
1 day ago $1.50 earnedBreek-Lok Quick Detach Hub Mount and Flash Hider System Review
32.7K6 -
57:44
Donald Trump Jr.
10 hours agoExclusive Interview with Deputy Secretary of State Chris Landau | Triggered Ep266
119K60 -
58:40
BonginoReport
13 hours agoModern Dating Woes & How To Resist Temptation w/ Tilly Dillehay - Hayley Caronia (Ep.109)
51.1K25