-1<=cosx<=1,
-4<=4cosx<=4,
-4<=-4cosx<=4,
3-4<=3-4cosx<=3+4,
-1<=3-4cosx<=7,
E=[-1;7]
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
-1<=cosx<=1,
-4<=4cosx<=4,
-4<=-4cosx<=4,
3-4<=3-4cosx<=3+4,
-1<=3-4cosx<=7,
E=[-1;7]