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February 1, 2015

February 1, 2015

Posted by **yo** on Tuesday, December 20, 2011 at 4:48pm.

aydame por favor

gracias

- matematicas -
**Steve**, Tuesday, December 20, 2011 at 6:21pm1 - (cosx)^2 + cosx + 1 = 0

cos^2 - cos - 2 = 0

(cosx - 2)(cosx + 1) = 0

cosx no puede ser 2

cosx = -1

x = pi

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