Question

1. cos(-5пі)
2. tg(-210)
3. cos(7пі/4)
4. tg(10пі/3)
5. sin (9пі/4)
6. ctg(7пі/6)

Answer 1

Ответ:

Cos(-5π) = Cos(5π) = 1

Tg(-210°) = Tg(-180°-30°) = -Tg(30°) ≈ -0.57735026918962576

Cos(7π/4) = 0.25000000000000004

Tg(10π/3) ≈ 2.5198440661511746

Sin(9π/4) ≈ -0.70710678118654755

Ctg(7π/6) ≈ -1.1547005383792516

Объяснение: