Разложение в ряд Фурье функции

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=X4LIcjJsggY

Вот таким образом любую гладкую кривую можно трассировать в ряд Фурье, представляя в виде суммы тригонометрических базовых функций.","styleRuns":[{"startIndex":0,"length":131,"styleRunExtensions":{"styleRunColorMapExtension":{"colorMap":[{"key":"USER_INTERFACE_THEME_DARK","value":4294967295},{"key":"USER_INTERFACE_THEME_LIGHT","value":4279440147}]}},"fontFamilyName":"Roboto"}]},"headerRuns":[{"startIndex":0,"length":131,"headerMapping":"ATTRIBUTED_STRING_HEADER_MAPPING_UNSPECIFIED"}]}},{"itemSectionRenderer":{"contents":[{"continuationItemRenderer":{"trigger":"CONTINUATION_TRIGGER_ON_ITEM_SHOWN","continuationEndpoint":{"clickTrackingParams":"CL8BELsvGAIiEwiCp5XPpOCLAxU75EIFHUd2HqE=","commandMetadata":{"webCommandMetadata":{"sendPost":true,"apiUrl":"/youtubei/v1/next"}},"continuationCommand":{"token":"Eg0SC1g0TEljakpzZ2dZGAYyJSIRIgtYNExJY2pKc2dnWTAAeAJCEGNvbW1lbnRzLXNlY3Rpb24%3D","request":"CONTINUATION_REQUEST_TYPE_WATCH_NEXT"}}}}],"trackingParams":"CL8BELsvGAIiEwiCp5XPpOCLAxU75EIFHUd2HqE=","sectionIdentifier":"comment-item-section","targetId":"comments-section"}}],"trackingParams":"CL4BELovIhMIgqeVz6TgiwMVO-RCBR1Hdh6h"}},"secondaryResults":{"secondaryResults":{"results":[{"compactVideoRenderer":{"videoId":"CbDN2u9qTdI","thumbnail":{"thumbnails":[{"url":"https://i.ytimg.com/vi/CbDN2u9qTdI/hqdefault.jpg?sqp=-oaymwEbCKgBEF5IVfKriqkDDggBFQAAiEIYAXABwAEG rs=AOn4CLB4fRuDH5_Rvg1lEQyY74-b0hHMCw","width":168,"height":94},{"url":"https://i.ytimg.com/vi/CbDN2u9qTdI/hqdefault.jpg?sqp=-oaymwEcCNACELwBSFXyq4qpAw4IARUAAIhCGAFwAcABBg== rs=AOn4CLDAuYTrJKmYcQfkvp5fIcfejPR9ow","width":336,"height":188}]},"title":{"accessibility":{"accessibilityData":{"label":"13.2 Разложение функции в ряд Фурье. 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