1) Сtgx = 1
x = arcCtg1 + π k , k∈Z
x = π/4 + πk , k ∈Z
Ответ: π/4
2)Cosx/2 = √2/2
x/2 = +-arcCos(√2/2) + 2πk , k ∈Z
x/2 = +-π/4 + 2πk , k∈Z
x = +-π/2 +4πk , k ∈Z
Ответ: π/2
3)2Sinx = √3
Sinx = √3/2
x = (-1)^narcSin√3/2 + nπ, n ∈Z
x = (-1)^n π/3 + nπ, n ∈ Z
Ответ: 2π/3
<span>на 1. </span>
<span>3 ^ 1 = 3 </span>
<span>3 ^ 2 = 9 </span>
<span>3 ^ 3 = 7 </span>
<span>3 ^ 4 = 1</span>
120/168 делим на 8 = 15/21
720/640 делим на 80 = 9/8, выделяем целую часть=1,1/8