Question

СРОООЧНООО,ПОМОГИТЕ ПОЖАЛУЙСТАААААААААА​

Answer 1

а)

$\displaystyle sin(\frac{41\pi }{7})=sin(6\pi -\frac{\pi }{7})=sin(-\frac{\pi }{7})=-sin\frac{\pi }{7}$

б)

$\displaystyle cos(\frac{23\pi }{8})=cos(4\pi -\frac{9\pi }{8})=cos(\pi +\frac{\pi }{8})=-cos\frac{\pi }{8}$

в)

$\displaystyle sin(-\frac{27\pi }{8})=-sin(4\pi -\frac{5\pi }{8})=sin(\pi -\frac{3\pi }{8})=sin\frac{3\pi }{8}$

г)

$\displaystyle cos(-\frac{37\pi }{4})=cos(10\pi -\frac{3\pi }{4})=cos\frac{3\pi }{4}=cos(\pi -\frac{\pi }{4})=-cos\frac{\pi }{4}$