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April 21, 2014

April 21, 2014

Posted by **don** on Wednesday, November 2, 2011 at 10:03pm.

- Trig -
**Reiny**, Wednesday, November 2, 2011 at 10:07pm2cosxsinx + sinx = 0

sinx(2cosx + 1) = 0

sinx = 0 or cosx = -1/2

x = 0, π, 2π or x = 2π/3, 4π/3

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