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HayleyRizhik
@HayleyRizhik
July 2022
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Решите неравенство:
tg^2x=>9
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EgorTat
(tgx)^2-9>=0; (tgx-3)(tgx+3)>=0; Реши по формулам уравнения tgx=3; tgx=-3. Проверь знаки неравенств. Выбери нужное.
5 votes
Thanks 3
mymurkin
Tgx≥3 и tgx≤-3
x∈(arctg3 +πn;π/2+πn) и x(-π/2+πn;-arctg3+πn) n∈Z
2 votes
Thanks 3
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Answers & Comments
x∈(arctg3 +πn;π/2+πn) и x(-π/2+πn;-arctg3+πn) n∈Z