2x=\pi n; n e Z => x=\frac{\pi n}2 ; ne Z" alt="sin2x=0 => 2x=\pi n; n e Z => x=\frac{\pi n}2 ; ne Z" align="absmiddle" class="latex-formula">
cos2x=\frac{1}2" alt="2cos2x-1=0=>cos2x=\frac{1}2" align="absmiddle" class="latex-formula">
x=\frac{\pi}6+\pi n; n e Z;" alt="2x=\frac{\pi}3+2\pi n; n e Z=>x=\frac{\pi}6+\pi n; n e Z;" align="absmiddle" class="latex-formula">
x=\frac{2\pi}6+\pi n; n e Z=> x=\frac{\pi}3+\pi n; n e Z" alt="2x=\frac{2\pi}3+2\pi n; n e Z=> x=\frac{2\pi}6+\pi n; n e Z=> x=\frac{\pi}3+\pi n; n e Z" align="absmiddle" class="latex-formula">
