A unit circle superimposed on the coordinate plane. The x-coordinate is the value of cosine at the given angle and the y-coordinate is the value of sine., vintage line drawing or engraving illustration. premium vector by Morphart

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white illustration art black line vintage drawing geometry degree unit plane circles engraved engraving degrees analytic angles cot coordinate cos cosine quadrants radians cotangent cosecant quadrantal radian csc

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