Tell me  area of mathematics  whose name has the word  trigonometry in it.
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q1936384 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'trigonometry')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
area of mathematics: Q1936384