Inegalitate cu sin si cos

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Mateescu Constantin
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Inegalitate cu sin si cos

Post by Mateescu Constantin »

Sa se arate ca pentru orice \( x\in \mathbb{R} \) avem inegalitatea:

\( \sin (\sin^{2}x)+\cos(\cos^{2}x)>\frac{1}{2}. \)
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DrAGos Calinescu
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Post by DrAGos Calinescu »

Incearca \( \cos(\cos^2 x)>\frac{1}{2}. \)
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