KENZASEFRIOUIBENZ KENZASEFRIOUIBENZ BREVET Answered Calculer A, B et C sachant que: A = sin² 40° + sin2° + sin²50° - cos88° B = 3cos228° + sin251° + 3cos²62° + co.²39° C = racine carrée1 – sinx x racine caree1 + sinx
