September 2018 1 51 Report

uprość wyrażenie

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


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