February 2019 1 35 Report
1) Pada Segitiga ABC , yang siku siku di C diketahui bahwa Sin a . Sin b = 2/5
dan Sin ( a-b) = 5a .
Tentukanlah Nilai a !

2) Jika sin tetha = -1/4 dan tan tetha > 0
maka tentukan cos tetha

ps: tanda "titik " artinya kali
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