29)
[tex]soit \: x \: un \: reel \: de \: ouver \: a \: - \pi \: ouver \: a \: 0 \: tel \: que \: \cos(x) = \frac{ \sqrt{2} }{2} . \: determiner \: la \: valeur \: exacte \: de \: \sin(x) [/tex]
Bonsoir, svp besoin d'aide. Merci d'avance. ​
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