Skip to content
MathsGenie logo
Open app

Course home

  1. A Level
  3. Maths OCR (MEI)
  5. Flashcards

1.7.15 Sec, cosec and cot functions (A-level only)

Secant: sec⁡x=\sec x=secx= [...]\text{[...]}[...], and it is undefined when cos⁡x=0\cos x=0cosx=0.

A

Secant: sec⁡x=\sec x=secx= 1cos⁡x\boxed{\frac{1}{\cos x}}cosx1​​, and it is undefined when cos⁡x=0\cos x=0cosx=0.

B

sec⁡θ=10\sec\theta=\sqrt{10}secθ=10​.

C

233\boxed{\frac{2\sqrt3}{3}}323​​​

D

Because ∣cos⁡x∣≤1|\cos x|\leq1∣cosx∣≤1, so its reciprocal has ∣sec⁡x∣≥1|\sec x|\geq1∣secx∣≥1.

1.7.15 Sec, cosec and cot functions (A-level only) Flashcards

  1. A Level
  2. /Maths
  3. /1.7.15 Sec, cosec and cot functions (A-level only)

Flashcards for OCR (MEI) A Level Maths 1.7.15 Sec, cosec and cot functions (A-level only), covering the key formulae, methods and definitions you need to recall for Component 01, Component 02 and Component 03. 23 cards, matched to the OCR (MEI) A Level Maths (H640) specification. Recall questions account for roughly 50% of marks at A Level Maths, so these target the marks you can secure before the paper starts.

Flashcards