Question

2*sin п/6*tg п/4+cos(-п)-sin п/4

Answer 1

Ответ:

$2 \times \sin( \frac{\pi}{6} ) \times \tan( \frac{\pi}{4} ) + \cos( - \pi) - \sin( \frac{\pi}{4} ) = 2 \times \frac{1}{2} \times 1 + ( - 1) - \frac{ \sqrt{2} }{2} = - \frac{ \sqrt{2} }{2}$