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Practice question

Question

If a + b + c = 0,;| a| = 3,;| b| = 5 and | c| = 7 , find the angle between a and b .

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Choose one · Correct answer highlighted

Explanation

Let's break it down: we verify π / 3 by full calculation: use standard identity, substitute, simplify step by step to reach π / 3.

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