Question
Question: If **a** and **b** be unlike vectors, then **a . b** =...
If a and b be unlike vectors, then a . b =
A
| a | | b |
B
– | a | | b |
C
0
D
None of these
Answer
– | a | | b |
Explanation
Solution
, (∵cosθ=−1).
If a and b be unlike vectors, then a . b =
| a | | b |
– | a | | b |
0
None of these
– | a | | b |
, (∵cosθ=−1).