Question

find the angle between A=i+2j-k and B -i+j-2k

Answer 1

Hi,

Some question error if this is a question I can solve it
"In a triangle A = I + 2j - k and B = - I + j - 2k
Then find c"

For this the answer is
⭐⭐⭐⭐⭐
A + B + C = 180
I + 2j - k - I + j - 2k + C = 180
3j - k + C = 180
C = 180 - 3j - k
⭐⭐⭐⭐⭐

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