CBSE Class 12-science Answered
if vector a,vector b,vector c,are unit vectorssuch that their sum is equal to 0,find the value of a.b vector+b.c vector+c.a vector
Asked by | 07 Nov, 2012, 08:32: PM
Expert Answer
Here bold stands for vector and lets mag.a=a=1, mag.b=b=1, mag.c=c=1
Since all these are unit vectors and since their sum is zero, we have
(a+b+c).(a+b+c)=0.0=0
Now expanding the left hand side term by term we get
a2+ b2+ c2+2(ab+bc+ca)=0
or, ab+bc+ca=-3/2
Answered by | 08 Nov, 2012, 04:54: PM
Concept Videos
CBSE 12-science - Maths
Asked by sdmbotch1123 | 18 Jan, 2023, 11:01: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
If |𝑎⃗| = 3 and −1 ≤ 𝑘 ≤ 2, then |𝑘𝑎⃗| lies in the interval
(a) [0,6] (b) [−3,6] (c) [3,6] (d) [1,2]
Asked by mohdtayyab682 | 18 Jan, 2023, 10:34: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Asked by durgaprasaddurgaprasad174 | 01 Jul, 2022, 05:05: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Asked by sujaychandramouli | 24 May, 2022, 10:46: AM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Asked by abhimeena1011 | 18 Jan, 2022, 10:43: AM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Asked by gurupadam3101985 | 11 Apr, 2020, 10:06: AM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Asked by lovemaan5500 | 07 Feb, 2020, 09:49: AM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Asked by lovemaan5500 | 07 Feb, 2020, 09:49: AM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Asked by lovemaan5500 | 16 Dec, 2019, 09:34: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Asked by Vivek.d8765 | 29 Oct, 2019, 10:14: PM
ANSWERED BY EXPERT