September 2018 1 39 Report
Uprosć wyrażenie:
1)(cosα*tgα+sinα*ctgα)²=
2) tgα+cosα/(1+sinα)=

sprawdż czy równosć jest tożsamościa trygonometryczna
a)tgα/(tgα+ctgα)=sin²α
b)tgα+cosα/(1+sinα)=1/cosα

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