If i need to find the angle between two vectors a, b, which method should i use? dot or cross product?

And in when do i use dot/cross product to find the angle?

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- Apr 24th 2008, 12:29 PMMilKDot or Cross product?
If i need to find the angle between two vectors a, b, which method should i use? dot or cross product?

And in when do i use dot/cross product to find the angle? - Apr 24th 2008, 12:32 PMMoo
Hello,

The dot product uses the cosine of the angle between the vectors and the cross product uses the sine of the angle :)

So it depends/ - Apr 24th 2008, 12:35 PMIsomorphism
- Apr 24th 2008, 12:41 PMMoo
- Apr 25th 2008, 12:16 AMMilK
so if i want to find the angle, i can use either dot or cross product? which will give me the same result?

- Apr 25th 2008, 12:18 AMo_O
Yes although I agree that using the dot product would in general be more easier. If you were given two vectors, would you rather find their scalar or cross product?

- Apr 25th 2008, 12:30 AMMilK
of cos dot(Nod)