Question

Решите уравнение  cos(П3 - 2x)=12

Answer 1

$cos(frac{pi}{3}-2x)=frac{1}{2}\frac{pi}{3}-2x=pm frac{pi}{3}+2pi n,;; nin Z\2x=frac{pi}{3}mp frac{pi}{3}-2pi n\a) 2x=-2pi n,; x=-pi n ;; ili;; x=pi n\b); 2x=frac{2pi}{3}-2pi k,;;x=frac{pi}{3}-pi k;;ili;;x=frac{pi}{3}+pi k,;; kin Z$