Mathematics A-Level
Domains of reciprocal functions
What Domains of reciprocal functions means in Mathematics A-Level, as defined for Pearson Edexcel.
Definition of Domains of reciprocal functions
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Reference: Pearson Edexcel
Values where the denominator is zero are excluded, so sec θ and tan θ are undefined where cos θ = 0, and cosec θ and cot θ where sin θ = 0.
Topics that use Domains of reciprocal functions
- Trigonometry (Pearson Edexcel A-Level)
Related terms
- Arcsin, arccos and arctan
- area of a triangle
- Asymptotes
- Domain
- Equations involving multiples of the unknown angle
- Exact values
- Fundamental trigonometric identities
- Geometrical proofs
Using Domains of reciprocal functions in the exam
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