Tg(y+7n\2), если tg=-2\7

Question

Tg(y+7n\2), если tg=-2\7

Comments

tgy= -2/7?

Answer 1

Tgy=-2/7
tg(y+7π2)=tg(y+π/2+3π)=-ctgy=-1/tgy=-1:(-2/7)=7/2 =3,5
  Ответ: 3,5.