Calculate cos(75∘)\cos(75^\circ)cos(75∘) using addition formulas.
6−24\frac{\sqrt{6}-\sqrt{2}}{4}46−2
6+24\frac{\sqrt{6}+\sqrt{2}}{4}46+2
2−64\frac{\sqrt{2}-\sqrt{6}}{4}42−6
1/21/21/2