(SinB + Cosb) / (SinB - CosB)^(-1) = -(CosB + SinM) * (CosB - SinB) = -(Cos^2 B - Sin^2B) = - Cos2B = - (1 - Sin^2 2B)^1/2 =
= -(1 - (-0.6)^2)^1/2 = - (1 - 0.36)^1/2 = -0.64^1/2 = -0.8
3а*-5ь*-2с=-30аьс
-25а*0.04с=-ас
<span>(y²)⁴*y/y⁶=у⁸*у/у⁶=у⁹/у⁶=у³</span>