Cos x =-1/2 sinx =1/2 tg x =1 ctg =-1 - вопрос №4115758121211 от marmishenka 07.06.2023 08:03

Question

Алгебра: Cos x =-1/2 sinx =1/2 tg x =1 ctg =-1

marmishenka · Answer

Cosx≤ -1/2 ;2πk+ π - π/3 ≤ x  ≤ π + π/3 + 2πk ;2πk+ 2π/3 ≤ x  ≤ 4π/3 + 2πk . sinx ≥1/2 ;2πk+ π/6  ≤ x  ≤ π - π/6 + 2πk ;2πk+ π/6  ≤ x  ≤ 5π/6 + 2πk .tqx ≤ 1 ;πk  - π/2 ≤ x ≤ π/4 + πk .ctqx ≥ -1 ;πk  +0 ≤ x ≤ π-π/4 + πk ;πk   ≤ x ≤ 3π/4 + πk....

Cos x< =-1/2 sinx> =1/2 tg x< =1 ctg > =-1