(4cos^2x-3)/(log_5(-tgx)=0
CPO4HO
0\\-tgx\neq1\\cos^2x=\frac{3}{4} \end{cases}" alt="\begin{cases} -tgx>0\\-tgx\neq1\\cos^2x=\frac{3}{4} \end{cases}" align="absmiddle" class="latex-formula">
k целое