January 2019 1 19 Report
Jeśli x∈R-{x:x=kπ, k∈C}:
a) wykaż, że:

tg \ x= \frac{2tg \frac{x}{2} }{1-tg^2 \frac{x}{2} }

b) Korzystając ze wzoru z podpunktu a) oblicz tg(π/12)

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