If \( O \) is the origin and \( P(2,3) \) and \( Q(4,5) \) are two points then \( O P \cdot O Q ... VIDEO
If \( O \) is the origin and \( P(2,3) \) and \( Q(4,5) \) are two points then \( O P \cdot O Q \cos \angle P O Q= \)
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