Mathematics A-Level
quadratic approximations
What quadratic approximations means in Mathematics A-Level, as defined for WJEC.
Definition of quadratic approximations
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Reference: WJEC
In equation solving, substituting small-angle approximations reduces trigonometric expressions to solvable quadratic or linear equations in θ.
Topics that use quadratic approximations
- Trigonometry (A2 Unit 3: Pure Mathematics B) (WJEC A-Level)
Related terms
- composite trigonometric arguments
- domain and range
- double angle formulas
- exact trigonometric values
- harmonic form
- inverse trigonometric functions
- mixed angle equations
- power reduction identities
Using quadratic approximations in the exam
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