Sin(60°+a)sin(60°-a) = (1/2)*[cos(60° + α - 60° + α<span>) -
- cos(</span>60° + α + 60° - α)] = (1/2)*[cos2α - cos(120°)] =
= (1/2)*[cos2α + cos(60°)] = (1/2)*[cos2α + 1/2)] = (1/2)*cos2α + 1/4
Log(2)(x)+log(8)(x)=8
log(2)(x)+log(2)(x) / log(2)(8)=8
log(2)(x)+(1/3)*log(2)(x)=8
(4/3)*log(2)(x)=8
log(2)(x)=8*3/4
x=2^6
x=64
0.49p^4-m²g^6=(0.7p²-mg³)(0.7p²+mg³)
Решение смотри в приложении
2sinx(sinx-√3cosx)=0
sinx=0⇒x=πn
sinx-√3codx=0
2(1/2*sinx-√3/2cosx)=0
sin(x-π/3)=0
x-π/3=πn
x=π/3+πn