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[751.] IX.
[752.] Calcul des Triangles rectangles. PROPOSITION I. Probleme.
[753.] PROPOSITION II. Probleme.
[754.] PROPOSITION III. Probleme.
[755.] PROPOSITION IV. Probleme.
[756.] PROPOSITION V. Probleme.
[757.] PROPOSITION VI. Theoreme.
[758.] Démonstration.
[759.] PROPOSITION VII. Theoreme.
[760.] Demonstration.
[761.] PROPOSITION VIII. Probleme.
[762.] Lemme.
[763.] Demonstration.
[764.] PROPOSITION IX. Probleme.
[765.] PROPOSITION X. Theoreme
[766.] Demonstration.
[767.] PROPOSITION XI. Probleme.
[768.] PROPOSITION XII. Theoreme.
[769.] Demonstration.
[770.] PROPOSITION XIII. Probleme.
[771.] Uſages des Logarithmes pour le calcul des Triangles.
[772.] Exemple I.
[773.] Exemple II.
[774.] Exemple III.
[775.] Application de la Trigonometrie a la pratique. PROPOSITION XIV. Probleme.
[776.] Remarque.
[777.] PROPOSITION XV. Probleme.
[778.] Remarque generale.
[779.] PROPOSITION XVI. Probleme.
[780.] PROPOSITION XVII. Probleme.