Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**tony123****Member**- Registered: 2007-08-03
- Posts: 189

Find all solutions of

sin x + sin 2x = sin 4x

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**JaneFairfax****Member**- Registered: 2007-02-23
- Posts: 6,868

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