18. Magnitudes of two vectors A and B are 3 respectively. If is the angle between them then for wide
value ofe, A. B will be: (i) zero (ii) 12 (iii) 6 (IV)-12
19. Product of magnitude of A and B is 12. Scalar produce
A and B is 673. Find angle between A and B. Find
angle when scalar product of A and B will be zero.
20. If magnitude of two vectors are 3 and 4 and the
magnitude of their scalar product is 6 then find the angle between them.
21. If the angle between vectors of magnitude F = 30
and d = 4.0m is 60° then find F. d. What physical
quantity is represented by this product?
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