Спростити вираз ctg^2x+1

Question

Спростити вираз ctg^2x+1

Answer 1

Ctg 2 x=1; 2х = П/4 + Пn, n є Z; х = П/8 + Пn/2, n є Z

Comments

1+ctg^2x = 1+ cos^2x / sin^2x = (sin^2x +cos^2x )/ sin^2x = 1/ sin^2x