How to find the direction of a vector

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username4167452
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#1
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There's a lack of clarity in my textbooks. In the mechanics book, when finding the direction of the vector it actually asks for the bearing but in Pure Maths the book states that 'direction of a vector is often measured anti-clockwise from the positive axis to the vector'. Which is it?
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begbie68
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it really depends on the question.

How would you describe the direction of a 3D vector?
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username4167452
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(Original post by begbie68)
it really depends on the question.

How would you describe the direction of a 3D vector?
I'm not too sure, normally for 3D they just ask for angle with corresponding axis. In terms of 2D vectors though, is there a general rule on finding the direction?
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begbie68
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The general rule is : the direction IS the vector.
But that's not what you're after.
For that, there is no rule except for what's required in the particular question.
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username4167452
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(Original post by begbie68)
The general rule is : the direction IS the vector.
But that's not what you're after.
For that, there is no rule except for what's required in the particular question.
so can what I stated in the OP be used for individual pure and mechanics question?
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begbie68
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Yes. There is no confusion, or contradiction btwn the textbooks.
you wrote :

"direction of a vector is often measured .... "

ie not a hard & fast rule. Same for the bearing situation.

Like I said, it depends on what the individual question is demanding.
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username4167452
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(Original post by begbie68)
Yes. There is no confusion, or contradiction btwn the textbooks.
you wrote :

"direction of a vector is often measured .... "

ie not a hard & fast rule. Same for the bearing situation.

Like I said, it depends on what the individual question is demanding.
thanks
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