Elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J · New York: J. Wiley & sons · leaf 257
ULA PLANE TRIGONOMETRY. 1. The complement of an angle or arc is the remainder obtained by subtracting the angle or arc from 90°. 2. The supplement of an angle or arc is the remainder obtained by subtracting the angle or arc from 180°. 3. The reciprocal of a quantity is the quotient arising from… … AC ~ AC ~ ACAB AB AITAC~ AC ~ ACThe ratios of the sides to each other are there-Fig. 79. fore fae same in all right triangles having thesame acute angle: so that, if these ratios are known in any oneof these triangles, they will be known in all of them. Theseratios, being thus dependent only on the…
Astronomy
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