# C3 - Formulae to learn

Flashcards by Tech Wilkinson, updated more than 1 year ago
 Created by Tech Wilkinson over 6 years ago
246
26

### Description

OCR Mathematics Core 3

## Resource summary

 Question Answer $$\sec \theta$$ $$\frac{1}{\cos \theta}$$ $$\mathrm{cosec} \theta$$ $$\frac {1}{\sin \theta}$$ $$\cot \theta$$ $$\frac{1}{\tan \theta}$$ $$\sec^2 \theta$$ $$1 + tan^2 \theta$$ $$\mathrm{cosec}^2 \theta$$ $$1 + \cot^2 \theta$$ $$\sin 2A$$ $$2 \sin A \cos A$$ $$\cos 2A$$ = $$2 \cos^2 A-1$$ $$\cos^2 A - sin^2 A$$ = $$1-2 \sin^2 A$$ $$\tan 2A$$ $$\frac {2 \tan A}{1 - \tan^2 A}$$

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