Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
General Math
Calculus
Differential Equations
Topology and Analysis
Linear and Abstract Algebra
Differential Geometry
Set Theory, Logic, Probability, Statistics
MATLAB, Maple, Mathematica, LaTeX
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
General Math
Calculus
Differential Equations
Topology and Analysis
Linear and Abstract Algebra
Differential Geometry
Set Theory, Logic, Probability, Statistics
MATLAB, Maple, Mathematica, LaTeX
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Mathematics
General Math
Angle between vectors via scalar product vs vector product
Reply to thread
Message
[QUOTE="andylatham82, post: 5728479, member: 619790"] Hello, I have a question about why I can't determine the angle between two vectors using their cross product. Say there are two vectors in the XY-plane that we want to find the angle between: [B]A[/B] = -2.00[B]i [/B]+ 6.00[B]j B [/B]= 2.00[B]i [/B]- 3.00[B]j [/B] The method to do this would be to work out the [I]scalar[/I] product of the vectors, calculate the magnitude of each vector, and use these to determine the angle via this relationship: [B]A[/B]⋅[B]B [/B]= AB cos ∅ In the example above, this gives a correct angle of 165°. However, I feel like it should be possible to arrive at the same answer using a [I]vector[/I] product method instead. So I tried calculating the vector product, and used it with the calculated magnitudes of the vectors and the following relationship: [B]A[/B]X[B]B [/B]= AB sin Φ However, using this method results in an angle of 15.3°. I must be missing something in the way all of this works and wondered if anyone could provide me with the knowledge I'm missing! Thanks! Andy [/QUOTE]
Insert quotes…
Post reply
Forums
Mathematics
General Math
Angle between vectors via scalar product vs vector product
Back
Top