Question

Question
Hindi
The angle between the vectors 2i +j -3k and 3i -2j -k is​

Answer 1

Step-by-step explanation:

UI (3) J +) A force (3ỉ +2Î) N displaces an object through a distance (2î -3ỉ)m. The work (W= 7.5) done is : (1) zero *).(-3) (2) 12 J 87 69 (4) 13 J If BO PO. then angle between and Ő is :

Answer 2

Answer:

$\alpha = 60 \: degree. = \frac{\pi}{3}$

Step-by-step explanation:

$\cos( \alpha ) = \frac{(2i + j - 3k).(3i - 2j - k)}{ | \sqrt{ {2}^{2} + {1}^{2} + {3}^{2}} | . | \sqrt{{3}^{2} + {2}^{2} + {1}^{2} } | } \\ \\ = \frac{6 - 2 + 3}{ \sqrt{14} \sqrt{14} } \\ \\ = \frac{7}{14} = \frac{1}{2} \\ \\ \alpha = 60 \: degree. = \frac{\pi}{3}$