Thus, the value of $ b $ is $ \boxed{3} $.Question: In a palynological study, three pollen grain counts are modeled by vectors $\vec{A}, \vec{B}, \vec{C}$, each of unit magnitude. If the total angular deviation between each pair satisfies $\cos^{-1}(\vec{A} \cdot \vec{B}) + \cos^{-1}(\vec{B} \cdot \vec

Mon, 04 May 2026 11:40:51 +0000

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