Question

 Ре­ши­те урав­не­ние .

Answer 1

$(cos^2x-cos x)sqrt{-11tgx}=0;\ tgxgeq0;\ D(f): -fracpi2 +pi n<xleqpi n;\D(f): xinleft(-fracpi2+pi n;pi nright] nin Z;\cos^2x-cos x=0;\cos x=0 x=fracpi2+pi nnotin D(f);\cos x=1 x=2pi nin D(f);\tgx=0; x=pi n;\\\\\<span>x=pi n, nin Z.$