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Mathematics: Analysis and Approaches · Topic 3: Geometry and trigonometry

SL3.6 — Trigonometric identities

Mathematics: Analysis and Approaches · SL / HL · syllabus-mapped notes

  1. The Pythagorean identity

    Relate sine and cosine of the same angle.

  2. Double angle identities

    Express sin and cos of 2θ in terms of θ.

  3. Relating the ratios

    Find one ratio from another without finding the angle.

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