Question

Решите задачки первое не надо

Answer 1

2) a) tg(270° +α) = -tgα
     б) Ctg(π +α) = -Ctgα
     в) Sin(-585° + α) = -Sin(585° -α) = -Sin(360° - 15° -α)
= -Sin(360° -(15° +α)) = Sin(15° +α)
3)Sinx = -√2/2
    x = (-1)^n (-π/4) + πn, n∈Z
    x = (-1)^(n+1) π/4 + nπ, n ∈Z

Answer 2

почему 585 заменилось на 345?

Answer 3

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