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

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**skylor****Guest**

Use an identity to solve each equation on the interval (0,2pi)

2cos^2x+sin x -1 = 0

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,170

hi skylor

You can use

to eliminate the** cos** from the expression and make a quadratic in **sin.**

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

Pages: **1**