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Ask by Haynes Cox. in Italy
Mar 15,2025

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L’inequazione è vera quando . Questo accade:
  1. Quando entrambi e sono positivi, nel primo quadrante: e periodi successivi.
  2. Quando entrambi e sono negativi, nel terzo quadrante: e periodi successivi.
Quindi, la soluzione è:

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Mind Expander

To solve the inequality , we first simplify it to (since multiplying by -1 reverses the inequality). Knowing that , we deduce that our inequality reduces to . This means must lie in intervals where the sine function is positive, which occurs in the ranges and .
Thus, for the original , the solution converts to:
  • leading to
  • giving
So, values satisfying are in and .

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