Question

The Resultant of two vectors Å vector & B vector is perpendicular to A vector,|R| is
equal to |B|/2 Find angle between A vector and B vector.​

No irrelevant answers.

Answer 1

Answer:

2

B

=

A

2

+B

2

+2ABcosθ

....(i)

∴tan90

o

=

A+Bcosθ

Bsinθ

⇒A+Bcosθ=0

∴cosθ=−

B

A

Hence, from (i)

4

B

2

=A

2

+B

2

−2A

2

⇒A=

3

2

B

⇒cosθ=−

B

A

=−

2

3

∴θ=150

o