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  1. Sine, Cosine and Tangent - Math is Fun

  2. Sine and cosine - Wikipedia

  3. Sine, Cosine, Tangent, explained and with Examples and practice ...

  4. The Law of Cosines - Math is Fun

  5. Cosine Calculator

  6. Cosine Function (Cos) - Definition, Formula, Table, Graph, Questions

  7. Cosine - Math.net

  8. Cosine - Graph, Meaning, Period, Examples | Cosine Function

  9. Cosine -- from Wolfram MathWorld

  10. Cosine - math word definition - Math Open Reference