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Solve: trig simplify cos²x - sin²x — Detailed Solution | AhaStep

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📐 MathLevel 2 — 🟢 Basictrig_simplify👁 16 views⏱ 1 min read

Solve: trig simplify cos²x - sin²x

📝 Problem

trig simplify cos²x - sin²x

✨Detailed Solution

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1. 📝 Expression: cos^2x - sin^2x

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2. 🔄 Apply identity:

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3. 🎯 Result: cos(2x)

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Đáp án: cos(2x)

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Solve: trig simplify 1 + tan²x