Question

cos(x)*ctg(x)-корень(3)*cos(x) = 0

Answer 1

$cosx*ctgx-sqrt{3}cosx=0 \ cosx(ctgx-sqrt{3})=0 \ x neq pi k, k in mathbb{Z} \ cosx=0; x= frac{pi}{2}+pi k; k in mathbb{Z} \ ctgx=sqrt{3}; x = frac{pi}{3}+2 pi k,; x=frac{4pi}{3}+2pi k k in mathbb{Z}$