<span>log3;x^2 - log3^2;(-x) + 3=0</span>
1) 1 - Ctg T = 1 - CosT\SinT = ( SinT - CosT) \ SinT
2) 1 - TgT = 1 - SinT\CosT = ( CosT - SinT) \ CosT
3) (SinT - CosT) \ SinT ) : ( CosT - SinT ) \ CosT = ( - CosT ) : SinT = ( - Ctg T)
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