Jawabanmu

2014-09-06T18:54:35+07:00
2014-09-06T21:27:32+07:00
Dik
misalkan 
A = 5 satuan
B = 3 satuan
α = 60 
Selisih = ?

S =  \sqrt{ A^{2} + B^{2}  - 2.A.B.cos 60}
S =  \sqrt{ 5^{2} + 3^{2} - 2.5.3.0,5}
S =  \sqrt{25 + 9 - 15}
S =  \sqrt{19}
S = 4,36 satuan


semoga membantu ^-6