0000:00:00:00:00Start18Number 18ExplanationA cube ABCD.EFGHABCD.EFGHABCD.EFGH has an edge length of 444 units. If ∠α\angle \alpha∠α is ∠HDF\angle HDF∠HDF, then the value of sinα\sin \alphasinα is ....136\frac{1}{3}\sqrt{6}316132\frac{1}{3}\sqrt{2}312133\frac{1}{3}\sqrt{3}313122\frac{1}{2}\sqrt{2}212123\frac{1}{2}\sqrt{3}213
18Number 18ExplanationA cube ABCD.EFGHABCD.EFGHABCD.EFGH has an edge length of 444 units. If ∠α\angle \alpha∠α is ∠HDF\angle HDF∠HDF, then the value of sinα\sin \alphasinα is ....136\frac{1}{3}\sqrt{6}316132\frac{1}{3}\sqrt{2}312133\frac{1}{3}\sqrt{3}313122\frac{1}{2}\sqrt{2}212123\frac{1}{2}\sqrt{3}213
