решить неравенство:
cos x/2 < 1/3
cos x/2<1/3
arccos1/3+2πn<x/2< (2π- arccos1/3)+2πn
2arccos1/3+4πn< x<4π- 2arccos1/3+4πn, n∈Z
2arccos1/3+4πn <x< -2arccos1/3+4π(n+1), n∈Z
Copyright © 2025 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
cos x/2<1/3
arccos1/3+2πn<x/2< (2π- arccos1/3)+2πn
2arccos1/3+4πn< x<4π- 2arccos1/3+4πn, n∈Z
2arccos1/3+4πn <x< -2arccos1/3+4π(n+1), n∈Z