Задача 6010 Cos^2x-1/2*sin2x+cosx=sinx...

Somkinav

29.01.2016

Cos^2x-1/2*sin2x+cosx=sinx

AlisherHodiev

31.01.2016

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cos^2x - sinxcosx +cosx - sinx = 0
cosx (cosx - sinx ) + cosx - sinx = 0
(cosx-sinx)(cosx-1) = 0
1) tgx =1 2)cosx =1
x= П/4 +Пn x = 2Пn