Hale, Joseph W. L. (Joseph Woodwell Ledwidge), 1886- · New York [etc.] McGraw-Hill book company · leaf 173
would be larger and therefore sine a would be larger.When angle a = 0°, line AB = 0 in. and sine a = 0,that is, sine 0° - 0. When a = 90°, line AB = lineOE in length or 1 in. and therefore sine 90° = 1. There- 158 MECHANICS AND ALLIED SUBJECTS fore for angle between 0° and 90° the sine increases… … equals to scale the cosine ofa = 0, OB = OC, and cosa = 1. When angle a = 90°, lineOB = 0, and cosine 90° = 0. Therefore, for angles between0° and 90° the cosine decreasesas the angle increases. The fig-ure on this sheet is like the pre-ceding figure, page 157 drawnagain here for convenience.…
Mechanics, Applied
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
