Mathematics A-Level
inverse trigonometric functions
What inverse trigonometric functions means in Mathematics A-Level, as defined for WJEC.
Definition of inverse trigonometric functions
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Reference: WJEC
Arcsin x (sin⁻¹ x), arccos x (cos⁻¹ x) and arctan x (tan⁻¹ x) require restricted domains of the original functions to be one-to-one.
Topics that use inverse trigonometric functions
- 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
- mixed angle equations
- power reduction identities
- quadratic approximations
Using inverse trigonometric functions in the exam
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