April 2019 1 146 Report
Besoin d'aide svp c urgent

On propose de résoudre l'équation cosx + sinx = -1 dans l'intervalle [ 0 ; 2\pi ]
1_ Montrer que (cosx + sinx +1)2 = 2(1 + cosx)(1+sinx)
2_ En déduire la résolution de l'équation proposée.
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