Question

$\cos(x) tg(x + 5) = 0$
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Answer 1

cosx=0

tg(x+5)=0

x=pi/2+pi*n

x=pi*n-5

Answer 2

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