October 2018 1 67 Report
1.diketahui :
sin a =3/5
cos b=12/3

a & b sudut lancip nilai sin (a-b)=...

2. pada segitiga ABC diketahui bahwa perbandingan sisi-sisi a:b:c= 2:3:4
maka nilai sin (a-b)... ???

mohon dibantu ya.... trims ^_^

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