Question

5*cos(x) +2*sin(x)=0
буду признателен :)

Answer 1

5cosx+2sinx=0 |:cosx≠0
5+2tgx=0
2tgx=-5
tgx=-2,5
x=arctg(-2,5)+πn, n∈Z
x=-arctg2,5+πn, n∈Z