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Mathematics 10 Online
OpenStudy (anonymous):

cos^2(x)+2cos(x)+1=0

OpenStudy (anonymous):

lot cosx=a

OpenStudy (alekos):

this is just a quadratic equation with cosx as the variable

OpenStudy (anonymous):

solve the equation on the interval (0<x<2pi)

OpenStudy (alekos):

do you know how to solve a^2 + 2a +1 =0 ?

OpenStudy (anonymous):

yes thank you i got it

OpenStudy (alekos):

OK good. your welcome

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