Question

The resultant of 2 vectors A and B is perpendicular to the vector A and its magnitude is equal to half the magnitude of vector B. Angle between A and B is ​

Answer 1

Answer:

150

0

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

Explanation:

Your 100% correct answer is e=150

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Answer 2

Explanation:

here is the answer of your question

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