Music Why sin and cos don’t mean anything by DDF - January 25, 2018 0 Source Tags: arabic, cos, cosine, etymology, etymology of sine, history, history of maths, latin, math, mathematics, maths, origin of sine, sanskrit, science, sin, sine, Sinus, sohcahtoa, trig, trigonometry, what is sine cosine and tangent, why sin and cos don't mean anything