Question

$cos(x) tg(x + 5) = 0$
​

Answer 1

cosx=0

tg(x+5)=0

x=pi/2+pi*n

x=pi*n-5

Answer 2

спасибо большое, очень помогли

Answer 3

$cos(x)*tg(x+5)=0\\left { {{cosx=0} atop {tg(x+5)=0}} right. =>left { {{x_1=frac{pi }{2}+pik, k in Z} atop {x_2+5= pi k ,k in Z }} right. =>left { {{x_1=frac{pi }{2}+pik, k in Z} atop {x_2=pi k -5, k in Z }} right.$