Find the value of cos(105∘)\cos(105^\circ)cos(105∘) using the sum identity.
2−64\frac{\sqrt{2}-\sqrt{6}}{4}42−6
6−24\frac{\sqrt{6}-\sqrt{2}}{4}46−2
2+64\frac{\sqrt{2}+\sqrt{6}}{4}42+6
6+22\frac{\sqrt{6}+\sqrt{2}}{2}26+2