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| phase shift identities (в тригонометрии: правила вроде sin (90 + a) = cos a; For examples, google \ trigonometric phase shift identities \ CopperKettle) | |||
| reduction formulas | |||
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| reduction formula | |||
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формулы приведения : 5 phrases in 4 subjects |
| Astronomy | 1 |
| Makarov | 2 |
| Mathematics | 1 |
| Technology | 1 |
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