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

You are not logged in.

#1 2012-10-24 12:24:40

skylor
Guest

Trig Interval

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

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

#2 2012-10-24 19:33:10

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,092

Re: Trig Interval

hi skylor

You can use

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

Bob


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

Offline

Board footer

Powered by FluxBB