Решение во вложениииииииииииииииииииииииии
- 216Х - 36 = 36 - 18X
- 216X + 18X = 36 + 36
- 198X = 72
X = - 72/198 = - 4/11
<span>cos 107° cos 17° + sin107° sin17<span>°=cos(107-17)=cos90=0
cos36</span>° cos24° - sin36° sin24<span>°=cos(36+24)=cos60=1/2
sin63</span>° cos27°+ cos63° sin27<span>°=sin(63+27)=sin90=1</span></span>