studytherin: ʚ 18th apr 2017 ɞ hello! darkness my old friend revising basic trigonometry for th
studytherin: ʚ 18th apr 2017 ɞ hello! darkness my old friend revising basic trigonometry for the advanced one i’m taking this semester *sobs* i think conic section is the only topic i did well after attending senior high school (ಠ_ಠ) -- source link