A) \[\hat{w}=\hat{v}-2(\hat{a}.\hat{v})\,\hat{a}\]
B) \[\hat{w}=\hat{v}-3(\hat{a}.\hat{v})\,\hat{a}\]
C) \[\hat{w}=\hat{v}-4(\hat{a}.\hat{v})\,\hat{a}\]
D) \[\hat{w}=\hat{v}+2(\hat{a}.\hat{v})\,\hat{a}\]
E) None of these
Correct Answer: A
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