Mathematics A-Level
Derivation of Pythagorean identities
What Derivation of Pythagorean identities means in Mathematics A-Level, as defined for Pearson Edexcel.
Definition of Derivation of Pythagorean identities
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Reference: Pearson Edexcel
Dividing sin²θ + cos²θ = 1 by cos²θ gives sec²θ = 1 + tan²θ, and dividing by sin²θ gives cosec²θ = 1 + cot²θ.
Topics that use Derivation of Pythagorean identities
- Trigonometry (Pearson Edexcel A-Level)
Related terms
- Arcsin, arccos and arctan
- area of a triangle
- Asymptotes
- Domain
- Domains of reciprocal functions
- Equations involving multiples of the unknown angle
- Exact values
- Fundamental trigonometric identities
Using Derivation of Pythagorean identities in the exam
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