`{:(,"स्तम्भ 'अ'",,,"स्तम्भ 'ब'"),((i),cos(x+y),,(a),sin x cos y + cos x sin y),((ii),cos(x-y),,(b),cos x cos y - sin x sin y),((iii),sin(x+y),,(c ),cos x cos y + sin x sin y),((iv),sin (x-y),,(d),sin x cos y - cos x sin y),((v),tan (x-y),,(e ),(tan x - tan y)/(1+tan x tan y)):}`

Answer

`(i)to(b), (ii)to(c ), (iii)to(a), (iv)to(d), (v)to(e )`.