решить:
(2sinx-sin2x)/(2sinx+sin2x)=tg^2 x/2
Срочно!!!
2sinx-2sinxcosx/2sinx+2sinxcosx=sinx/1+cosx
2sinx(1-cosx)/2sinx(1+cosx)=sinx/1+cosx
1-cosx/1+cosx=sinx/1+cosx
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Answers & Comments
2sinx-2sinxcosx/2sinx+2sinxcosx=sinx/1+cosx
2sinx(1-cosx)/2sinx(1+cosx)=sinx/1+cosx
1-cosx/1+cosx=sinx/1+cosx