Cosine is an unincorporated community in the Rural Municipality of Heart's Hill No. 352, Saskatchewan, Canada. It is located about 5 kilometres from the Alberta-Saskatchewan border.
Named after Cosine Lake, which is about 3 kilometres north. The name comes from when one of the surveyors in the area made an error in calculation during his work.[1]
52°08′25″N 109°55′55″W / 52.14028°N 109.93194°W / 52.14028; -109.93194
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