Question

sin x2 = -корень квадратный из22

Answer 1

$sin frac {x}{2}=-frac {sqrt{2}}{2}; frac{x}{2}=(-1)^k *(-frac {pi}{4})+pi*k; frac{x}{2}=(-1)^{k+1}frac {pi}{4}+pi*k;x=(-1)^{k+1}frac {pi}{2}+2*pi*k$, k є Z

Answer 2

$sinfrac{x}{2}=-frac{sqrt{2}}{2}$

$frac{x}{2}=(-1)^{n-1} *frac{pi}{4}+pi*n$

$x=(-1)^{n-1}*frac{pi}{2}+2pi*n$