Question

Ответ- 3(D) . Нужно Решение!​!!!

Answer 1

$((tg^{2}\frac{7\pi }{24}-tg^{2}\frac{\pi }{24}):(1-tg^{2}\frac{7\pi }{24}*tg^{2}\frac{\pi }{24}))^{2}=(\frac{(tg\frac{7\pi }{24}-tg\frac{\pi }{24})(tg\frac{7\pi }{24}+tg\frac{\pi }{24})}{(1+tg\frac{7\pi }{24}*tg\frac{\pi }{24})(1-tg\frac{7\pi }{24}*tg\frac{\pi }{24})})^{2}=(tg(\frac{7\pi }{24}-\frac{\pi }{24})*tg(\frac{7\pi }{24}+\frac{\pi }{24}))^{2}=(tg\frac{\pi }{4}*tg\frac{\pi }{3})^{2}=(1*\sqrt{3})^{2}=3$