Question

упростите пожалуйста!!!!!!!!!!!!!!!!!!!

Answer 1

ctg²(α)*sin²(α)-1          ( cos²(α)/sin²(α) ) * sin²(α)- (sin²(α)+cos²(α))
------------------------- = ----------------------------------------------------------------- =
tg( α)*cos(α)               (sin(α)/cos(α) ) * cos(α) 

      -sin²(α)
= ------------------ = - sin(α)
       sin(α)