Mathematics: Analysis and Approaches · Topic 3: Geometry and trigonometry
SL3.6 — Trigonometric identities
Mathematics: Analysis and Approaches · SL / HL · syllabus-mapped notes
The Pythagorean identity
Relate sine and cosine of the same angle.
Double angle identities
Express sin and cos of 2θ in terms of θ.
Relating the ratios
Find one ratio from another without finding the angle.