Question

Помогите пожалуйста. Номера 5 и 6
Срочно !!!!

Answer 1

5.

sinx=-1/2

$x=(-1)^{k}arcsin(\frac{-1}{2})+\pi k$, k∈Z

$x=(-1)^{k}(\frac{-\pi}{6})+\pi k$, k∈Z

x=(7π/6)∈[π/2;3π/2]

cм рис.

6.

cos(π)=-1;

sin(-5π/2)=-1

tg(4π/3) = tg(π+(π/3))= - tg(π/3)= - √3

tg²(4π/3) =3

О т в е т. -1-(-1)+3=3