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ника2219
@ника2219
July 2022
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помогите пожалуйста решить 1 !
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dasdasfa
1) (cos^2 a-1) /(1-sin^ a) -tga ctga=-sin^2 a /cos^2 a -1=-tg^2 a-1=-(1+tg^2 a)=
=-1/cos^2 a
2)=2*(cosπ/3 cosa -sinπ/3 sina)-cosa+√3sina=2*(1/2)cosa-2*(√3/2)sina-cosa+
+√3sina=cosa -√3sina -cosa+√3sina=0
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Answers & Comments
=-1/cos^2 a
2)=2*(cosπ/3 cosa -sinπ/3 sina)-cosa+√3sina=2*(1/2)cosa-2*(√3/2)sina-cosa+
+√3sina=cosa -√3sina -cosa+√3sina=0