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Timp rămas până la Black Week

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Dyablox
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8 hours ago, AT BiloSu said:

sinx+cosx totu la patrat = sin patrat de x + 2 sinxcosx + cos patrat de x ez

si de aici rezulta prin teorema fundamentala a trigonometriei faptul ca sin^2x + 2sinxcosx + cos^2x = 1 + 2sinxcosx = 1 + sin2x. cu placere

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