The definition, u⚫v= = |u| |v| cos 0, implies the Cauchy-Schwarz inequality that |u•v|≤|u| |v| (because cos 0 ≤ 1). This inequality holds in any number of dimensions and has many consequences. What conditions on u and v lead to equality in the Cauchy-Schwarz inequality? Choose the correct answer below. A. The two vectors u and v are perpendicular. B. The two vectors u and v are parallel. C. Either u= 0 or v=0.

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