Jawabanmu

2014-05-03T05:35:10+07:00
Gambarlah kubus ABCD.EFGH, hubungkan A ke G dan A ke C
Dari Δ GAC  sudut A = α
CG = 9 , AC = 9√2 dan AG = 9√3
Sin α = CG/AG = 9/9√3 = 1/√2 = 1/3 √3
Cos α = AC/AG = 9√2/9√3 = √2/√3 = 1/3 √6
Tan α = CG/AC = 9/9√2 = 1/√2 = 1/2 √2