Homework Sourselet a24 and b10 find the angle vector in degreesSolutiongive
let a=2,4 and b=1,0
find the angle vector, in degrees
Solution
given a=2,4 and b=1,0
a.b=2,4.1,0
a.b=(2*1)+(4*0)
a.b=2
|a|=[(-2)2+(-4)2]=20 ,|b|=[12+02]=1
angle between a and b is =cos-1((a.b)/|a||b|)
angle between a and b is =cos-1(-2/20*1)
angle between a and b is =cos-1(-1/5)
angle between a and b is =116.565o
![let a=2,4 and b=1,0 find the angle vector, in degreesSolutiongiven a=2,4 and b=1,0 a.b=2,4.1,0 a.b=(2*1)+(4*0) a.b=2 |a|=[(-2)2+(-4)2]=20 ,|b|=[12+02]=1 angle b](/WebImages/38/let-a24-and-b10-find-the-angle-vector-in-degreessolutiongive-1114872-1761591970-0.webp "let a=2,4 and b=1,0 find the angle vector, in degreesSolutiongiven a=2,4 and b=1,0 a.b=2,4.1,0 a.b=(2*1)+(4*0) a.b=2 |a|=[(-2)2+(-4)2]=20 ,|b|=[12+02]=1 angle b")
