Long description: block4fig2
Alt text: The image displays three diagrams illustrating the angle theta and the dot product between two vectors, labeled a and b.
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- The first diagram shows two vectors, labeled \(\mathbf{a}\) and \(\mathbf{b}\), originating from the same point and forming an angle theta between them, with an arc indicating the angle between the vectors.
- The second diagram shows a large 'x' mark, presumably indicating a cross product or cancellation.
- The third diagram shows two vectors, labeled \(\mathbf{a}\) and \(\mathbf{b}\), originating from the same point, forming an angle theta between them, with the angle indicated by an arc starting from vector \(\mathbf{a}\) and ending at vector \(\mathbf{b}\).