Тригонометрия 10 класс 4cos^3x-корень3cos2x=sin2x+2 И Cosp/17cos2p/17cos3p/17cos4p/17

1.
$4cos^{2}(x)- \sqrt{3cos(2x)} =sin(2x)+2$
$4cos^{2}(x)- \sqrt{3} \sqrt{cos(2x)}=sin(2x)+2$
$4cos^{3}(x)=sin(2x)+ \sqrt{3} \sqrt{cos(2x)}+2$
$cos^{3}(x)+cos(3x)- \sqrt{3} \sqrt{cos(2x)}=sin(2x)+2$
$cos^{3}(x)+3(cos(3x)- \sqrt{3} \sqrt{cos(2x)}-3sin^{2}(x)cos(x)$ $=2sin(x)cos(x)+2$
2.
$\frac{cos( \pi )}{17}( \frac{1}{17}cos(2 \pi))( \frac{1}{17}cos(3 \pi ))( \frac{1}{17} cos(4 \pi )= \frac{1}{83521}$