Hale, Joseph W. L. (Joseph Woodwell Ledwidge), 1886- · New York [etc.] McGraw-Hill book company · leaf 146
pp. side 10 ^__ tana = tan 30° = -~^—r^ = t^^t^ = -577 adj. side 17.3 - ^^o adj. side 17.3 ^ „_cot a = cot 30° = —^ —^T- = r^ = 1.73 opp. side 10 MEASUREMENT OF RIGHT TRIANGLES 131 In the same way for Fig. 108, in which a = 45°, 6 =45°, A = 20, B = 20, and C = 28.3 sin a = sin 45° = cos a = cos 45°… … 5--20Fig. 108. 60. Explanation of Use of Tables.—These functions,or ratios of sides for a right triangle can be calculated forany given angle by constructing the right triangle andmeasuring the length of its sides, but tables are preparedwhich give us these ratios for all angles from 0° to 90°in…
Mechanics, Applied
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