Question

задание по алгебре, срочнооо по братски​

Answer 1

$\displaystyle\bf\\2Cos\frac{\pi }{3} +Sin\Big(-\frac{\pi }{6} \Big)-tg\frac{\pi }{4}= 2Cos\frac{\pi }{3} -Sin\frac{\pi }{6} -tg\frac{\pi }{4}= \\\\\\=2\cdot\frac{1}{2} -\frac{1}{2} -1=1-\frac{1}{2} -1=-\frac{1}{2} =-0,5$