Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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Topic review (newest first)
- bob bundy
- 2012-10-25 18:33:10
hi skylor
You can use
to eliminate the cos from the expression and make a quadratic in sin.
Bob
- skylor
- 2012-10-25 11:24:40
Use an identity to solve each equation on the interval (0,2pi)
2cos^2x+sin x -1 = 0