A2.Functiile Fk:R→ R, k apartine {1, 2, 3},
F1(x)=x/2+3/16·sin(4x/3)-3radical din 3/16·cos(4x/3),
F2(x)=x/2-3/4·sin(pi/6-2x/3),
F3(x)=x/2-3/8·cos(pi/6+4x/3), sunt primitive ale functiei
f:R→ R, f(x)=cos^2(pi/6-2x/3) ?

