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C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.

The Theory and Practice of Surveying: Containing All the Instructions ... - Page 108
by Robert Gibson - 1811 - 508 pages
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Practical Astronomy: A Textbook for Engineering Schools and a Manual of ...

George Leonard Hosmer, James Melvin Robbins - Spherical astronomy - 1948 - 404 pages

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Basic Mathematics for Engineering and Science

Walter Roe Van Voorhis - Engineering mathematics - 1952 - 670 pages

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A Thousand and One Questions on Crystallographic Problems

Pieter Terpstra - Crystallography - 1952 - 204 pages

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Handbook of Structural Design

Irvine Ernest Morris - Structural analysis (Engineering) - 1963 - 854 pages

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The Builder's Dictionary: Or, Gentleman and Architect's Companion; Being a ...

Architecture - 1981 - 560 pages

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ASM Handbook of Engineering Mathematics

American Society for Metals - Engineering mathematics - 1983 - 720 pages

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The National Engineer, Volume 16

Steam engineering - 1912 - 1218 pages

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Calendar

University of Cambridge - 1816 - 348 pages

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Ohio Educational Monthly and the National Teacher, Volume 32, Issue 2

Education - 1888 - 66 pages

...logarithm of a number having four places. 5. Show that in any plane triangle the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference. GENERAL HISTORY. 1. Before the Greeks,...

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Trigonometry for the Practical Man

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