November 2018 2 47 Report

Proszę dokończyć to zadanie!

Wiadomo że kąt a jest ostry i \frac{sin(180-a)}{sin(90-a)}+\frac{tg(90+a)}{tg(90-a)}=3\\ Wykaz\ ze \cos a= \frac{\sqrt{17}}{17}\\ \frac{sina}{cosa}+\frac{-ctga}{ctga}=3\\

Zacząlem , proszę dokonczyc.


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