Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
A.B=9
A.B=|A|*|B| COSØ
When the two vectors are placed this way, the vectors form the angle q . ... The scalar product (dot product) A · B (A dot B) of vectors A and B is the ... Given A = i - j + k and B = 3i + 2j - k, find (a) A · B, (b) | A |, | B |, (c) the cosine of the angle between A and ... Find the vector projection, Proj A B when A = 5j - 3k and B = i + j + k.
a=i+2j+3k
b=3i-j+2k
we know that i.i=1 , j.j=1 , k.k=1. and i.j=j.i=i.k=k.i=j.k=k.j=0.
a.b=3-2+6=7
a.b=abcosθ
cosθ=(a.b)÷ab
{a=√a.a, b=√b.b} [ a=√14=b}
cosθ=7÷(14)=.5
θ=60
a.b = lal*lbl* cosx
and i.i=k.k=j.j=1
and i.j=i.k=j.k=0
hence a.b=3-2+6=7
and lal*lbl=sqrt(14)*sqrt(14)=14
hence 7=14*cosx
cosx = .5
x=60degree
DOT PRODUCT OF TWO VECTORS:
a=i+2j+3k,b=3i-j+2k then a.b=(1)(3)+(2)(-1)+(3)(2)=3-2+6=7
let alpha be the angle between the vectiors a and b. then cos(alpha)=a.b/modulus(a).modulus(b)
=7/root14.root14
=7/14=1/2
=cos(alpha)=cos60
=alpha=60
ANSWER
3-2+6=7
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !