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Βιβλία Βιβλία 21 - 24 από 24 για The sum of the two sides of a triangle is to their difference as the tangent of half....
" 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. "
An Introduction to the Theory and Practice of Plane and Spherical ... - Σελίδα 199
των Thomas Keith - 1810 - 420 σελίδες
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Report of twenty-one years' experience of the Dick bequest for elevating the ...

Allan Menzies - 1854
...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,...

Practical carpentry, joinery, and cabinet-making [by P. Nicholson. by P ...

Peter Nicholson - 1856 - 216 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,...

Examination papers used at the examinations for direct commissions [&c.].

War office - 1861 - 12 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...

The Mathematical Papers of Isaac Newton:, Τόμος 4;Τόμοι 1674-1684

Isaac Newton, D. T. Whiteside - 2008 - 722 σελίδες
...the base are proportional to the sines of the angles at the cathetus. 6. The cotangent of the half sum of the angles at the base is to the tangent of their half difference as the tangent of the half sum of the angles at the cathetus to that of the latter's...
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