small-angle approximation
What small-angle approximation means in Mathematics A-Level, as defined for AQA, Pearson Edexcel.
Definitions of small-angle approximation
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Reference: Pearson Edexcel
An algebraic expression used as a close estimate of a trigonometric function for an angle close to zero in radians.
An approximation valid for an angle close to zero when the angle is measured in radians.
Topics that use small-angle approximation
- E: Trigonometry (AQA A-Level)
- Trigonometry (Pearson Edexcel A-Level)
Related terms
- Identity
- period
- Periodicity
- principal value
- Radian
- Radian measure
- Trigonometric identities
- Algebraic manipulation
Using small-angle approximation in the exam
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