Understand and use the definitions of secant, cosecant and cotangent and of arcsin, arccos and arctan; their relationships to sine, cosine and tangent; understanding of their graphs; their ranges and domains(Pearson Edexcel A-Level)

Mastery Mind: Mathematics Revision · Oct 20, 2026 · 5m

Reciprocal and inverse trigonometric functions reward accuracy because a single denominator, asymptote or principal range controls the whole answer. Master the difference between a ratio and an angle-returning function, and Edexcel graph, domain/range and equation questions become a predictable source of marks. Listen to this audio revision guide for Understand and use the definitions of secant, cosecant and cotangent and of arcsin, arccos and arctan; their relationships to sine, cosine and tangent; understanding of their graphs; their ranges and domains. Test your knowledge with interactive…