3sinx - cosx = 0

3sinx\cosx - cosx\cosx = 0 sinx\cosx = tgx 3tgx - 1 = 0

3tgx = 1 tgx = 1\3 x = arctg 1\3 + пи * n

3sinx-cosx=0    \ cosx

3tgx - 1 =0

3tgx=1

tgx=1\3

x=arctg 1\3 + Пn,n∈z