6^cosx=2^cosx*3^cosx
2^cosx*3^cosx=2^-sinx*3^cosx
2^cosx=2^-sinx
cosx=-sinx
cosx+sinx=0
/ на cosx не= 0
1+tgx=0
tgx=-1
x=3pi/4+2(pi)f
x=7pi/4+2(pi)d
d,f принадлежат Z
6^cosx=2^cosx*3^cosx
2^cosx*3^cosx=2^-sinx*3^cosx
2^cosx=2^-sinx
cosx=-sinx
cosx+sinx=0
/ на cosx не= 0
1+tgx=0
tgx=-1
x=3pi/4+2(pi)f
x=7pi/4+2(pi)d
d,f принадлежат Z