April 2019 1 122 Report
Nilai tan x yang mungkin dari persamaan 4sec^{2} x - 9 tan x - 1 = 0 adalah ...
a. - \frac{1}{4}
b. \frac{1}{4}
c. -\frac{2}{5}
d. -\frac{5}{2}
e.  \frac{1}{2}
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