Cos pi/18 cos 3 pi/18 cos 5 pi/18 cos 7 pi/18 =3/16
please help me...
Mathematics, 03.01.2021 16:20 deer15
Cos pi/18 cos 3 pi/18 cos 5 pi/18 cos 7 pi/18 =3/16
please help me
Answers: 1
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