Упростите выражение: (cos)^2 α +(sin(π/2+α)*cos(π-α)/(ctg(π-α)*tg(3π/2-α))

Question

Упростите выражение:
(cos)^2 α +(sin(π/2+α)*cos(π-α)/(ctg(π-α)*tg(3π/2-α))

Answer 1

Фотография.......................

---