A trigonometrical identity
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
1991-01-01
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| Series: | International Journal of Mathematics and Mathematical Sciences |
| Online Access: | http://dx.doi.org/10.1155/S0161171291001102 |
| ISSN: | 0161-1712 1687-0425 |
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