Упростите sin(1/2п-x)*tg (-x)/cos (1/2п+x)

Question

Упростите sin(1/2п-x)*tg (-x)/cos (1/2п+x)

Answer 1

Sin(π/2-x)*tg(-x)/cos(π/2+x)=sinx*(-sinx/cosx)*(-1/sinx)=1