Mathematics A-Level
double angle formulas
What double angle formulas means in Mathematics A-Level, as defined for WJEC.
Definition of double angle formulas
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Reference: WJEC
Identities derived directly from the compound angle formulas by setting B = A, giving forms for sine, cosine and tangent of 2A.
Topics that use double angle formulas
- Trigonometry (A2 Unit 3: Pure Mathematics B) (WJEC A-Level)
Related terms
- composite trigonometric arguments
- domain and range
- exact trigonometric values
- harmonic form
- inverse trigonometric functions
- mixed angle equations
- power reduction identities
- quadratic approximations
Using double angle formulas in the exam
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