Physics, asked by sanviojha, 1 year ago

A = i + j-k; B = 2 i+3j +5k angle between A and Bis
(A) 120°
(B) 90°
(C)60°​

Answers

Answered by Martin84
5

Answer:

90°

Explanation:

A = I + j - k

B = 2i + 3j + 5k

A.B = ABCos@

2+3- 5= AB Cos@

ABcos@ = 0

Cos@ = 0

@ = π/2

@ = 90°

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