Let \(P_1\), \(P_2\), \(P_3\) be the altitudes of a triangle ABC from the vertices A, B, C respectively. If \(△\) denotes the area of the triangle and s is the semi-perimeter of the triangle, then \(\frac{cosA}{P_1}+\frac{cosB}{P_2}+\frac{cosC}{P_3} =\)