Question

Упростите выражение: tg(π/6)-tg(7π/12)/tg(π/6)tg(7π/12)+1

Answer 1

Ответ:

$\boxed{tg \ \left( \dfrac{\pi}{6} \right) - \dfrac{tg \ \left( \dfrac{7\pi}{12} \right)}{tg \ \left( \dfrac{7\pi}{12} \right)tg \ \left( \dfrac{\pi}{6} \right )} + 1= \dfrac{3 - 2\sqrt{3} }{3} }$

Объяснение:

$tg \ \left( \dfrac{\pi}{6} \right) - \dfrac{tg \ \left( \dfrac{7\pi}{12} \right)}{tg \ \left( \dfrac{7\pi}{12} \right)tg \ \left( \dfrac{\pi}{6} \right )} + 1 = tg \ \left( \dfrac{\pi}{6} \right) - ctg \ \left( \dfrac{\pi}{6} \right) + 1 = \dfrac{\sqrt{3} }{3} - \sqrt{3} + 1=$

$= \dfrac{\sqrt{3} }{3} - \sqrt{3} + 1 =\dfrac{\sqrt{3} - 3\sqrt{3}+ 3 }{3} = \dfrac{3 - 2\sqrt{3} }{3}$