=Cosxcosy-sinxsiny=0
0,6*cosy-0,8siny=o
Sin4x - sin6x = 0
sin6x ≠ 0, 6x ≠ πk, k∈Z, x ≠ πk/6, k ∈Z
2si(4x- 6x)/2*cos(4x + 6x)/2 = 0
- sinx * cos5x = 0
1) sinx = 0
x₁ = πn, n∈Z
2) cos5x = 0
5x = π/2 + πm, m∈Z
x₂ = π/10 + πm/5, m∈Z
А)=2м^9
б)=х^4×х^6=х^10
в)=z^3×z^8=z^11
г)=64м^3÷м^2=64м
д)=16м^6/16с^4=м^6/с^4
A^3+1=a^3-4
a^4=a^-1
a^4=1/a
a^5=1
a=1
1^3+1=1^3-4
1=1
a=1