Question

If a. b = ax bl then angle between a and b will be
(a)
(b) 1/4 (C) 1/2
d) 1/3
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Answer 1

Answer:

may be the answer is cot 45 = 1

Answer 2

what is the angle between vectors A and B,if magnitude of vectorsA,B, and C and12,5 and 13...