Question

Le
49.
The resultant of A and B is perpendicular to B.
What is the angle between A and B ?
A
-1
-1
B
(1) cos
(2) COS
B 띔
B
А
A
(3) sin
(4) sin
B
B​

Answer 1

Answer:

the option no.2 will be answer

Explanation:

If

C =A⃗ +B⃗

And

C is perpendicular to A

→C .A =0

→(A+B ).A =0

if, θ is the angle between A and B

→A2+ABcos(θ)=0

$→θ=COS^{-1} (\frac{-A}{B} )COS </p><p>−1</p><p> ( </p><p>B</p><p>−A</p><p> </p><p> ) )</p><p></p><p> </p><p>$