Physics, asked by areebatauseef18, 8 months ago

if A= + j + k and B= - j - k, then angle between A and B will be nearly?

Answers

Answered by deshdeepak88
2

Answer:

A⃗ = J+k |A⃗ |=1+1−−−−√=2–√

B⃗ = -j-k. |B⃗ |=1+1−−−−√=2–√

Letθbe the angle between two vectors

A⃗ ⋅B⃗ =|A⃗ ||B⃗ |cosθ

⟹1(0)+(−1)(1)+0(1)=2cosθ

⟹cosθ=−1/2

⟹θ=cos^-1−1/2=120∘or240∘

I think this is the correct answer.

please mark it as brainliest.

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