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