`{:(,"स्तम्भ 'अ'",,,"स्तम्भ 'ब'"),((i),sin x-sin y,,(a),-sin x),((ii),sin(pi-x),,(b),sin x),((iii),sin(pi+x),,(c ),2cos x(x+y)/(2)"sin"(x-y)/(2)):}`

Answer

`(i)to(c ), (ii)to (b), (iii)to(a)`