Plane trigonometry, by S.L. Loney.
74 TRIGONOMETRY. 76. The table of Art. 40 may now be extended to some important angles greater than a right angle. EXAMPLES. X. Prove that 1. sin 420~ cos 3900 + cos (- 3000) sin ( - 330~) = 1. 2. cos 570~ sin 510~ - sin 330~ cos 390= 0. and 3. tan225 cot4050+tan7650cot6750=0. What are the values of cos A - sin A and tan A + cot A when A has. the values rT 27r 57r 77, 113 4., 5., 6. -, 7. and 8, -- 3' 3' 4 7 4 3
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About this Item
- Title
- Plane trigonometry, by S.L. Loney.
- Author
- Loney, Sidney Luxton, 1860-
- Canvas
- Page 57
- Publication
- Cambridge [Eng.]: University press,
- 1893.
- Subject terms
- Plane trigonometry.
Technical Details
- Link to this Item
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https://name.umdl.umich.edu/abn7298.0001.001
- Link to this scan
-
https://quod.lib.umich.edu/u/umhistmath/abn7298.0001.001/98
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"Plane trigonometry, by S.L. Loney." In the digital collection University of Michigan Historical Math Collection. https://name.umdl.umich.edu/abn7298.0001.001. University of Michigan Library Digital Collections. Accessed May 2, 2025.