Question

чему равен sin 38pi/3​

Answer 1

$\displaystyle\bf\\Sin\frac{38\pi }{3} =Sin\Big(12\pi +\frac{2\pi }{3} \Big)=Sin\frac{2\pi }{3}=Sin\Big(\pi -\frac{\pi }{3}\Big)=\\\\\\=Sin\frac{\pi }{3} =\frac{\sqrt{3} }{2}$