October 2018 1 42 Report

Uzasadnij tożsamość:

e) \frac{2}{cos^2\alpha} - (tg\alpha + ctg\alpha)^2 = tg^2\alpha - ctg^2\alpha

f) 1-2sin^2\alpha * cos^2\alpha = sin^4\alpha + cos^4\alpha

Uprość wyrażenie:

e) (\frac{1}{cos\alpha} - 1)(\frac{1}{sin^2\alpha} - 1)

f) (cos\alpha + \frac{1}{cos\alpha})^2 + sin^2\alpha - tg^\alpha


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