(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
{ax+4y=6
{bx-3y=-2 x=1, y=1
{a+4=6 {a=6-4 {a=2
{b-3=-2 => {b=3-2 => {b=1
Ответ: a=2; b=1
35^9 + 35^8 = 35^8*(35 + 1) = 35^8 * 36 => 35^9 + 35^8 кратно 36.