Find the exact value of sin(18°)\sin(18°)sin(18°) using the identity for sin(3⋅18°)=sin(54°)\sin(3 \cdot 18°) = \sin(54°)sin(3⋅18°)=sin(54°).
5−14\frac{\sqrt{5} - 1}{4}45−1
14\frac{1}{4}41
5+14\frac{\sqrt{5} + 1}{4}45+1
54\frac{\sqrt{5}}{4}45