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Victoriag2626
24.12.2019 •
Mathematics
Prove: if b ≠ 0, then the cross product term can be eliminated from the quadratic form ax² + 2bxy + cy² by rotating the coordinate axes through an angle θ that satisfies the equation cot 2θ = a-c/2b.
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Ответ:
B. He thinks he is better
Explanation: