February 2019 1 5 Report
Diantara pernyataan berikut yang salah adalah....
A.Cos²x+Sin²x=1
B.Cos 2x=1-2sin2x
C.Cos 2x=2Cos²x-1
D.Tg²x+1=Sec²x
E.Ctg²x+1=Sec²x

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