February 2019 1 26 Report
Tan A = p, A sudut lancip. Nilai cos2A =

a,  \frac{2p}{1-p ^{2} }
b.  \frac{1-p^{2} }
c.  \frac{2p}{1+p^{2} }
d.  \frac{p^{2}-1}{p^{2}+1}
e.  \frac{p}{1+p^{2} }

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