October 2018 2 79 Report

Oblicz:

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

2)\ \frac{1}{1+tg^2\alpha}+\frac{1}{1+ctg^2\alpha}=

3)\ [\frac{(1-sin\alpha)(1+sin\alpha)}{sin^2\alpha}+\frac{1-cos\alpha)(1+cos\alpha)}{cos^2\alpha}](\frac{1}{sin^2\alpha\cdot cos^2\alpha})^-^1

Proszę dokładnie, krok po kroku.

Odpowiedź wyłącznie w załączniku lub w TeXie


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