 | Allan Menzies - 1854 - 520 σελίδες
...rule is, — Sum of the two sides (containing given angle) is to their difference as the tangent of half the sum of the angles at the base is to the tangent of half their difference ; half the sum = ^ (180 — angle C), then having found the half sum, J sum + £ diff. = greater angle,... | |
 | Peter Nicholson - 1856 - 518 σελίδες
...— THEOREM 2. 151. The sum of the two sides of a triangle is to their difference as the tangent of half the sum of the angles at the base is to the tangent of half their difference. Let ABC be a triangle 4 then, of the two sides, CA and CB, let CB be the greater. Produce CA to E,... | |
 | War office - 1861 - 714 σελίδες
...one side the base, prove that the sum of the other two sides is to their difference as the tangent of half the sum of the angles at the base is to the tangent of half their difference. 6. Observers on two ships a mile apart find the angles subtended by the other ship and a fort are respect... | |
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The sum of the two sides of a triangle is to their difference as the tangent of half the sum of the angles at the base is to the tangent of half their difference. 
