Mathematics A-Level
Double angle identities
What Double angle identities means in Mathematics A-Level, as defined for AQA.
Definition of Double angle identities
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Reference: AQA
Formulae used to express sin 2θ, cos 2θ and tan 2θ in terms of sin θ, cos θ and tan θ.
Topics that use Double angle identities
- E: Trigonometry (AQA A-Level)
Related terms
- Algebraic manipulation
- Amplitude
- Asymptote
- Derivation and manipulation of identities
- Domain and range restrictions for functions
- exact trigonometric values
- Graphical behaviour including asymptotes and ranges
- harmonic form
Using Double angle identities in the exam
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