X=-10: y = - 4 * (-10) = 40
x=3; y = - 4 * 3 = - 12
x=2; y= - 4 * 2 = -8
x=10; y = - 4 * 10 = -40
x = 13; y = -4 * 13 = -52
Y=2-2x
x+4-4x=-4
-3x=-8
x=8/3
8/3+2y=-4
2y=-4-8/3
2y=-20/3
y=-20/6=-10/3
5*8/3-4*10/3=40/3-40/3=0
1) 2x = πk, k∈ Z,
x = πk/2 , k∈ Z
2)2x = (-1)^narcSin(1/2) + nπ, n ∈Z
2x = (-1)^n*π/6 + nπ, n ∈Z
x = (-1)^n*π/12 + nπ/2, n ∈Z
3) Sinx = √2/2
x = (-1)^narcSin√2/2 + nπ, n ∈Z
x= (-1)^n*π/4 + nπ, n ∈Z
4) Cosx = √2/2
x = +-arcCos√2/2 +2πk, k ∈Z
x = +- π/4 + 2πk , k ∈Z