Основные тригонометрические формулы

" Рассмотрим прямоугольный треугольник <img src=\"data:image/png;base64,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\" height=\"15\" width=\"30\">

Выразим тригонометрические функции для угла <img src=\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAAPCAYAAAAyPTUwAAAAAXNSR0IArs4c6QAAAERlWElmTU0AKgAAAAgAAYdpAAQAAAABAAAAGgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAC6ADAAQAAAABAAAADwAAAAB0PvzGAAAAwklEQVQoFc2RrQoCQRSFx3+DSTApFmGzFkEwCTYVwaLdYvcdtpjtFsFn8AGsBk0GrfoENv1OuDCsDGLzwLdz7z1nd2ZY535Q5kt2jV+Cs3JpPQIaMZ9Cy/xQuExgATFEFg6tG4wmDOBkoawV3jqhvsIRntCAFLySx6gwXMEd5tCDItThQ1smHah5aJc+OP8YM3oZBxmeLtS65N7CVZoldCEpCzv9FG2xgwfcQF83DSnG0Ab5Lgd6SZfNg68CjXmq/0Fvn9sZSNjdrVMAAAAASUVORK5CYII=\" height=\"15\" width=\"11\">:

Рассмотрим сначала отношение <img src=\"data:image/png;base64,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\" height=\"30\" width=\"242\">

Рассмотрим отношение <img src=\"data:image/png;base64,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\" height=\"30\" width=\"250\">

Таким образом можно вывести формулы:

<img src=\"data:image/png;base64,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\" height=\"30\" width=\"69\"> -тангенс угла равен отношению синуса к косинусу этого угла

<img src=\"data:image/png;base64,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\" height=\"30\" width=\"87\"> котангенс угла равен отношению синуса к косинусу этого угла

Рассмотрим произведение <img src=\"data:image/png;base64,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\" height=\"30\" width=\"175\">

То есть произведение тангенса и котангенса одного и того же угла равно единице

Рассмотрим прямоугольные треугольник

По теореме Пифагора <img src=\"data:image/png;base64,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\" height=\"17\" width=\"112\">. Следовательно, <img src=\"data:image/png;base64,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\" height=\"16\" width=\"83\"><img src=\"data:image/png;base64,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\" height=\"36\" width=\"63\">

Докажем данные равенства с помощью прямоугольного треугольника <img src=\"data:image/png;base64,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\" height=\"15\" width=\"33\">, рассмотренного ранее

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Основные тригонометрические формулы

Нахождение тангенса и котангенса через синус и косинус

Основное тригонометрическое тождество

Связь косинуса с тангенсом и синуса с котангенсом