August 2018 1 69 Report
1. bila dalam barisan-barisan dalam geometri tak hingga, jumlah suku U1+U2 = 45 , U3+U4 = 20, maka jumlah suku barisan-barisan itu adalah?

2.  \frac{1-cos x}{sin x} = \frac{cos x}{1+cos x} , maka nilai tan x = ?


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