Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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#1 2012-10-25 11:24:40

skylor
Guest

Trig Interval

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

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

#2 2012-10-25 18:33:10

bob bundy
Moderator

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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

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