05. Trigonometric Identities

From the DfE Mathematics AS and A-Level Content (LINK): Trigonometric Identities E5-01 [Trigonometric Identities: Proving tanθ = sinθ / cosθ] E5-02 [Trigonometric Identities: Proving sin^2 θ + cos^2 θ = 1] E5-03 [Trigonometric Identities: Simplifying Expressions] E5-04 [Trigonometric Identities: arcsin(x) = arccos(y)] Further Trigonometric Identities E5-05 Trigonometric Identities: Proving sec^2 θ = 1 + tan^2 θ E5-06 Trigonometric Identities: Proving cosec^2 θ = 1 + cot^2 θ E5-07 Trigonometric Identities: Simplifying Further Expressions