Решение тригонометрических неравенств
:
:
IV ,
- ,
, .
1997 .
:
.
1.
.......................................................3
2.
.................................................................
.................4
3. XIX
.........................................................5
4.
......................................................7
5.
...................................................................
.....10
6.
..................................................15
7.
..............................................................
....................................17
8.
..........................................................19
:
1. . . , ,
, , 1974 .
2. . . ,
, , , 1990 .
3. . . ,
, , , 1987 .
4. . . , , , ,
1979 .
5. . . , , IX-X ,
, , 1983 .
6. . . , ,
, , 1983 .
7. . . , . . , . . ,
,
, , 1987 .
8. .. , . . ,
, , , 1966 .
9. . . , ,
, , 1964 .