Question

соs(x/5-П/12)=1
решите плиз

Answer 1

$frac{x}5}- frac{pi}{12}=t \ cost=1 \ t=2pi n, n in Z \ frac{x}5}- frac{pi}{12}=2pi n , nin Z \ frac{x}{5}=2pi n+frac{pi}{12}, n in Z \ x=10pi n + frac{5pi}{12}, n in Z$