When do I use |a×b| = |a||b|sinθ in Vectors & 3D Geometry, and what does it mean?
magnitude of the cross product (vector).
|a×b| = |a||b|sinθ — magnitude of the cross product (vector). Use it when: θ is the angle between the vectors. Always check the condition holds before plugging in numbers.
Key point
|a×b| = |a||b|sinθ
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