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tochilka_86
-: y"+y=1/(cos(2x)*sqrt(cos(2x)))

y"+y=0 => k^2+1=0 => k=+-i => y=C1*cos(x)+C2*sin(x)
:
C1'*cos(x)+C2'*sin(x)=0
-C1'*sin(x)+C2'*cos(x)=1/(cos(2x)*sqrt(cos(2x)))

, - C1' , . :
C2'=cos(x)/(cos(2x)*sqrt(cos(2x)))
C1'=-sin(x)/(cos(2x)*sqrt(cos(2x)))

1 C2, .. C1' C2'. , , !
, , ? ?
tig81
(tochilka_86 @ 19.12.2009, 22:17) *

C2'=cos(x)/(cos(2x)*sqrt(cos(2x)))

sinx=
C1'=-sin(x)/(cos(2x)*sqrt(cos(2x)))

cosx=

.
wils
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wils
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