Origin of the terms Sine, Cosine, Tangent check Ask Dr. Math check Ask Dr. Math Origin of the terms Sine, Cosine, Tangent http://mathforum.org/library/drmath/view/52578.html Origin of the terms Sine, Cosine, Tangent Origin of the terms Sine, Cosine, Tangent Origin of the terms Sine, Cosine, Tangent