October 2018 1 99 Report

Oblicz:

\frac{2cos^2\alpha\cdot ctg^2\alpha}{cos^2\alpha-ctg^2\alpha}=

Dochodzę do postaci:

\frac{\frac{2\cdot cos^4\alpha}{sin^2\alpha}}{cos\alpha-\frac{cos^2\alpha}{sin^2\alpha}}

I pytanie teraz, jak dalej to rozpisać?


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