(3+√7)²-2√63=9+6√7+7-2*3√7=16
3log7x больше или равно 6
log7 x>=2
x>=49
1) поделим на 2 все уравнение, получим
1/2sinx+√3/2cosx=1/2
sin(x+π/3)=1/2
x+π/3=π/6+2πn x+π/3=5π/6+2πn
x=-π/6+2πn x=π/2+2πn
2)поделиπм на 2
√3/2sinx+1/2cosx=1/2
sin(x+π/6)=1/2
x+π/6=π/6+2πn x+π/6=5π/6+2πn
x=2πn x=2π/3+2πn
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