Question

упростить выражение tg(5П/2-2B)​

Answer 1

$\displaystyle\bf\\tg\Big(\frac{5\pi }{2} -2\beta \Big)=tg\Big[2\pi +\Big(\frac{\pi }{2}-2\beta \Big)\Big]=tg\Big(\frac{\pi }{2} -2\beta \Big)=Ctg2\beta$