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1.8.5 Trigonometric identities

Card 1 of 23

The reciprocal function of cosine is [...]\text{[...]}[...].

A

5\mathbf{\sqrt5}5​

B

Divide every term by cos⁡2θ\cos^2\thetacos2θ.

C

sec⁡2θ≡1+tan⁡2θ\mathbf{\sec^2\theta\equiv1+\tan^2\theta}sec2θ≡1+tan2θ

D

The reciprocal function of cosine is sec⁡θ=1cos⁡θ\boxed{\sec\theta=\frac{1}{\cos\theta}}secθ=cosθ1​​.

Card 1 of 23

1.8.5 Trigonometric identities Flashcards

  1. A Level
  2. /Maths
  3. /1.8.5 Trigonometric identities

23 flashcards on AQA A Level Maths 1.8.5 Trigonometric identities: the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.

Flashcards