Question

ctg (x/4)-1=0 Дайте ответ срочно!

Answer 1

$\ctg( \frac{x}{4} ) - 1 = 0 \\ \ctg( \frac{x}{4} ) = 1 \\ \frac{x}{4} = \frac{\pi}{4} + \pi n \\ x = \pi + 4\pi n, \: n \in Z$