1) tg x/4 = √3
x = arctg pi/3 + pi·n n∈Z
2) sin (x/5-п/4)=1/2
x/5-п/4 = pi/6 + 2pi·n и x/5-п/4 = 5pi/6 + 2pi·n
x/5 = pi/6 + 2pi·n + pi/4 x/5 = 5pi/6 + 2pi·n + pi/4
x/5 = 5pi/12 + 2pi·n x/5 = 13pi/12 + 2pi·n
x = 25pi/12 + 10pi·n x = 65pi/12 + 10pi·n
x = 2pi + pi/12 + 10pi·n x = 5pi + 5pi/12 + 10pi·n
x = pi/12 + 2pi(5n + 1) x = 5pi/12 + 5pi(2n + 1)